(Material MCE (Mixed Cellulose Ester). 3) 3.1mm Intervals Grid Line: Gridded filters have clearly defined grid lines spaced at 3.1mm intervals. Contrasting grid lines facilitate counting colonies on the filter surface and are tested to assure freedom from grid line inhibition.
LEER MÁS600PCS 50ml Conical Centrifuge Test Tubes Sterile Plastic Graduated Container USMembrane Solutions Conical Centrifuge Tubes 50mL, Clear Plastic Centrifuge Tubes with Leak-Proof Screw Caps, Plastic Graduated Lab Test Container for Scientific ExperimentsConical Centrifuge Tubes 50mL Our 50mL centrifuge tube is made of polypropylene, sterilized with no human DNA. It withstands high-speed centrifugation and stays sealed tightly, making it an ideal solution for centrifugal separation. Clear graduations measure liquid volume quickly, and the white writing area makes labeling the tubes easy. Our conical centrifuge tube suitable for sample storage, separation, and analysis.Feature: 🧪 TUBE MATERIAL: These 50ml centrifuge tubes are made in high purity PP Material. They are designed to have longer length screw caps with sealing rings to prevent leakage. Pack of 25. 🧪 EASY TO DISTINGUISH: Plastic centrifuge tubes also include a convenient white writing patch for easy marking and identification. The patches are nice for labeling. And the test clear tubes with screw caps. 🧪 EASY TO READ: Black graduations of plastic centrifuge tubes are accurate to ±2%, 1mL increments (total 50mL). So these lab centrifuge tubes are better for science experiments. 🧪 AUTOCLAVABLE AND FREEZABLE: Max. RCF: 9,400 for conical bottom tubes; it is autoclavable at 121℃/249.8℉ and freezable to -80℃/-176℉, successfully passed 95 KPa pressure test. 🧪 WIDE APPLICATIONS: Our plastic centrifuge tubes are general used in fields of biochemistry and molecular biology，such as separation and preparation of various biological samples.WIDE APPLICATIONS： Plastic centrifuge tubes are commonly used in the fields of biochemistry and molecular biology, such as separation and preparation of various biological samples.Specification:Model:Conical Centrifuge TubeMaterial:PolypropyleneCapacity:50mLMax. RCF:9400xgColor of Cap:BlueType of Cap:Screws CapType of Bottom:ConicalNumber of Items:25Pcs/BoxProduct Size:1.18″x1.18″x4.65″/ 3x3x11.8 cm Package List: 1. 25Pcs x Centrifuge Tubes w/ Caps 2. 100Pcs x Centrifuge Tubes w/ Caps 3. 300Pcs x Centrifuge Tubes w/ Caps 4. 600Pcs x Centrifuge Tubes w/ Caps
LEER MÁSIntroduction: Membrane Solutions PTFE Syringe filters are purpose-built with features designed to bring the highest levels of performance and purity to your research. We incorporate a variety of membranes to offer separation and purification solutions for the majority of your laboratory needs. Features: Broad chemical compatibility Strong chemical stability and inertia Strong Hydrophilicity No contamination of the sample Designed with a Female Luer-Lock inlet and Male Luer-Slip outlets Technical Specification: PTFE Syring Filter, Pore Size: 0.22μm, Diameter: 13mmPart No.SFPTFE013022NLIFilter MediumPTFEFilter Diameter(mm)17Membrane Diameter(mm)13Pore Size(μm)0.22WettabilityHydrophilicSterileNoPrefilterPPFiltration Area(cm²)0.92Housing MaterialPPHoldup-Volume(μl)<10Volume Throughput(ml)<10Connections(Inlet/Outlet)Female Luer Lock inlet and Male Luer slip outletMax Operating Pressure(psi)87Max Operating Temperature(℃)130PTFE Syring Filter, Pore Size: 0.45μm, Diameter: 13mmPart No.SFPTFE013045NBIFilter MediumPTFEFilter Diameter(mm)17Membrane Diameter(mm)13Pore Size(μm)0.45WettabilityHydrophobicSterileNoPrefilterPPFiltration Area(cm²)0.92Housing MaterialPPHoldup-Volume(μl)<10Volume Throughput(ml)<10Connections(Inlet/Outlet)Female Luer Lock inlet and Male Luer slip outletMax Operating Pressure(psi)87Max Operating Temperature(℃)130PTFE Syring Filter, Pore Size: 0.22μm, Diameter: 25mmPart No.SFPTFE025022NBIFilter MediumPTFEFilter Diameter(mm)30Membrane Diameter(mm)25Pore Size(μm)0.22WettabilityHydrophobicSterileNoPrefilterPPFiltration Area(cm²)2.98Housing MaterialPPHoldup-Volume(μl)<100Volume Throughput(ml)<100Connections(Inlet/Outlet)Female Luer Lock inlet and Male Luer slip outletMax Operating Pressure(psi)87Max Operating Temperature(℃)130PTFE Syring Filter, Pore Size: 0.45μm, Diameter: 25mmPart No.SFPTFE025045NBIFilter MediumPTFEFilter Diameter(mm)30Membrane Diameter(mm)25Pore Size(μm)0.45WettabilityHydrophobicSterileNoPrefilterPPFiltration Area(cm²)2.98Housing MaterialPPHoldup-Volume(μl)<100Volume Throughput(ml)<100Connections(Inlet/Outlet)Female Luer Lock inlet and Male Luer slip outletMax Operating Pressure(psi)87Max Operating Temperature(℃)130Application:HPLC sample preparation Routine QC analysis Content uniformity Removal of protein precipitates Dissolution testing Food analysis Biofuel analysis Environmental samples Organic solvent with strong chemical causticity filtration Strong acid solvent filtration Alkali solvent filtrationPackage Included:1. 10pcs Sringe Filters 2. 50pcs Sringe Filters 3. 100pcs Sringe Filters 15mL Centrifuge Tubes50mL Centrifuge TubesVolume15mL50mLMaterialPolypropylenePolypropyleneSterile✓✓Conical✓✓Graduated✓✓Max RCF9400xg9400xgType of capscrew capscrew capRNase/DNase-free✓✓Non-Pyrogenic✓✓Packaging50pcs/pk25pcs/pk
LEER MÁSIntroduction:Membrane Solutions offer universal application for analytical procedures. Hydrophilic Nylon is ideal for aqueous (non-acidic) or organic sample prep and HPLC, GC or dissolution sample analysis. With its excellent flow characteristics, very low extractable levels and mechanical stability, Nylon offers the best combination of physical parameters to meet the most stringent analytical needs in 13mm/25mm diameters and 0.45μm/0.22μm Pore Size. The naturally hydrophilic, high protein binding and high dirt loading capacity of Nylon are natural advantages.Applications: Electric semiconductor industrial water filtration Chemicals filtration Beverage filtration Features: Hydrophilic property No need to moist beforehand Uniform aperture Strong tenacity and absorbability Syringe Filters for Cell Culture provide effective filtration for a wide variety of sample types Designed with a Female Lure-Lock inlet and Male Lure-Slip outlets Sterile Nylon Syringe Filters are individually wrapped sterile, certified RNA-free, DNA- free, and DNA –free with Non-phylogenicNylon Syringe Filter Pore Size: 0.45μm, Diameter: 13mm Part No.SFNY013045NIFilter MediumNylonFilter Diameter(mm)17Membrane Diameter(mm)13Pore Size(μm)0.45WettabilityHydrophilicSterileNoFiltration Area(cm²)0.92Housing MaterialPPHoldup-Volume(μl)<10Volume Throughput(ml)<10Connections(Inlet/Outlet)Female Luer Lock inlet and Male Luer slip outletMax Operating Pressure(psi)87Max Operating Temperature(℃)100 Nylon Syringe Filter Pore Size:0.22μm, Diameter:13mmPart No.SFNY025022NCUFilter MediumNylonFilter Diameter(mm)17Membrane Diameter(mm)13Pore Size(μm)0.22WettabilityHydrophilicSterileNoFiltration Area(cm²)0.92Housing MaterialPPHoldup-Volume(μl)<10Volume Throughput(ml)<10Connections(Inlet/Outlet)Female Luer Lock inlet and Male Luer slip outletMax Operating Pressure(psi)87Max Operating Temperature(℃)100Nylon Syringe Filter Pore Size:0.45μm, Diameter:25mmPart No.SFNY025022NCUFilter MediumNylonFilter Diameter(mm)30Membrane Diameter(mm)25Pore Size(μm)0.22WettabilityHydrophilicSterileNoFiltration Area(cm²)2.98Housing MaterialPPHoldup-Volume(μl)<100Volume Throughput(ml)<50Connections(Inlet/Outlet)Female Luer Lock inlet and Male Luer slip outletMax Operating Pressure(psi)87Max Operating Temperature(℃)100Nylon Syringe Filter Pore Size:0.22μm, Diameter:25mmPart No.SFNY025022NCUFilter MediumNylonFilter Diameter(mm)30Membrane Diameter(mm)25Pore Size(μm)0.45WettabilityHydrophilicSterileNoFiltration Area(cm²)2.98Housing MaterialPPHoldup-Volume(μl)<100Volume Throughput(ml)<100Connections(Inlet/Outlet)Female Luer Lock inlet and Male Luer slip outletMax Operating Pressure(psi)87Max Operating Temperature(℃)100Package list: 1. 10pcs Syringe Filters 2. 100pcs Syringe Filters 3. 500pcs Syringe Filters4. 1000pcs Syringe Filters5. 3000pcs Syringe Filters
LEER MÁS60PK Lab Polystyrene Bottle Top Vacuum Sterile Filter Graduated Clear 0.22um PESMembrane Solutions Sterile Disposable Vacuum Filter Units with 0.22um PES Membrane, 500mL Membrane Solutions Disposable Vacuum Filtration units are very useful in large volume samples separation and purification for tissue culture media, biological fluids and fixation buffers.0.22 µm for the sterile filtration of cell culture, media, buffers, and reagents. The unit includes membrane filter, graduated funnel of clear polystyrene with polyethylene neck adapter and polystyrene reservoir bottle with a separate sterile polyethylene cap. Specifications: 1) Bottle top vacuum filter is designed to fit plastic or glass media bottles with 45 mm neck sizes 2) Polyethersulfone (PES) membrane has a 0.22µm pore size and 17 sq cm area; provides the fastest flow rates and highest throughput(could filter 1.5L-2 L), lowest protein binding and low extraction rate, and best filtering of cell culture media. 3) Polystyrene filter funnel has a 500 mL capacity and a 45 mm diameter polyethylene neck adaptor with an angled hose connector that simplifies vacuum line attachment. 4) Individually packaged, sterile, and certified non-pyrogenic; designed for filtering and storing cell culture media, biological fluids, and other aqueous solutions Features: 1. High flow rates and throughput. 2. Low protein binding and extractable. 3. Sterilization by Gamma irradiation. 4. Sterile graded PES membrane, LRV＞7 for Brevundimonas diminuta, ATCC19146. 5. Non-pyrogen and surfactant-free. 6. Rapid-Flow multi-column membrane support system provides a uniform, consistent separation between touchpoints with the membrane, minimizing gap stress to maintain optimal flow. 7. Light weight with solid structure. 8. Reservoir bottles feature improved grip sides for easy handling, simplify tightening/ loosening and adjustments. 9. Designed wide and easy access bottle mouth for efficiently and stably pour out. 10. Designed hose connector can fit multiplicate hose diameters for vacuum source. Technical Specification:Part No.VFPPES222500 VFPPES222500MaterialPolystyrene (PS)Filter MediumPESCapacity500mLPore Size(μm)0.22Funnel Capacity(ml)500Receiver Capacity(ml)500PackagingIndividualNeck Diameter45mmSpecification MetCertified frustration-freeSterileYes (Gamma Irradiation)Item ShapeCylindrical Package Included:4 Pack: 4pcs 500ml Sterile Vacuum Filter Bottle or 8 Pack: 8pcs 500ml Sterile Vacuum Filter Bottle or 12 Pack: 12pcs 500ml Sterile Vacuum Filter Bottle or 16 Pack: 16pcs 500ml Sterile Vacuum Filter Bottle or 20 Pack: 20pcs 500ml Sterile Vacuum Filter Bottle or 24 Pack: 24pcs 500ml Sterile Vacuum Filter Bottle or 28 Pack: 28pcs 500ml Sterile Vacuum Filter Bottle or 32 Pack: 32pcs 500ml Sterile Vacuum Filter Bottle or 36 Pack: 36pcs 500ml Sterile Vacuum Filter Bottle or 40 Pack: 40pcs 500ml Sterile Vacuum Filter Bottle or 60 Pack: 60pcs 500ml Sterile Vacuum Filter Bottle Please note: If your shipping address are Alaska, Hawaii, US APO/FPO, US Protectorates, there have extra shipping fee according to the package weight. Please contact us for the shipping fee. On Jun 3, 2024 at 02:36:32 PDT, seller added the following information:
LEER MÁSMembrane Solutions Brand: Membrane Solutions founded in 2006. MS@ have devoted continuous efforts to bring about lab filtration solutions to all humankind with high-tech membrane technologies.Who we are? Membrane Solutions is a manufacturer and modifier of microporous menbranes, and a manufacturer of microfiltration devices. Membrane Solutions develops and produces products for Laboratory, Process and Municipal Applications.What we do? Membrane Solutions product are manufactured under ISO9001, and in a certified clean room environment using the latest manufacturing technologies, strict QC and QA principles conducted throughout. Rich experience has been accumulated by years of filter developing.Our values: Membrane Solutions LLC knows how to provide and help scientists to seclect the RIGHT membrane filter, with MS lab filtration products, scienctists are sure going to have the accurate testing results effeciently.Membrane Solutions 10ml 20mm, Borosilicate Glass Standard Crimp Headspace Vial,10ml Capacity,Flat Bottom,Beveled Finish, 22.5x46mm, (Pack of 100）Product Description Membrane Solutions 10mL vials-glass clear headspace vial crimp top, flat bottom. These vials are made of borosilicate glass of uniform thickness, flat bottom for even heat distribution, resistant to high and low temperatures. Size: 22.5*46mm, the vial mouth outer diameter is 20mm, 20 mm crimp seal finish are designed to fit most headspace autosampler. Features: Size: 22.5*46mm, the vial mouth outer diameter is 20mm,20 mm crimp seal finish are designed to fit most headspace autosamplers; Material: Manufactured from clear Type I borosilicate glass, of which can withstand high internal pressure, the vials have a wall thickness of 1.1mm; Beveled Finish Vial : Reduced the amount of sealing surface between the crimp seal and the glass surface,Also A bevelled top Headspace Neck might be required for some special closure systems; Flat Bottom Vial: when vials have to run within the instrument on a slightly downwards tendency and preferred for manual headspace autosamplers,Flat bottom maximizes heating efficiency; Wide Range of Applications: Our small glass vials have good sealing effect and easy to carry, it can be used in laboratories and homes and it is the best choices for storing various liquids and powders or conducting science education. It is suitable for most prevention and control autosamplers. like Aglient, Carlo Erba, DANI, CTC PAL(Varian, Gerstel, Atas, Shimadzu)Thermo Scientific, TriPlus HS, Fisons, SPME Vial for CTC PAL. Quantity: 100 pcs/pk. Product Information: Series: Headspace Vial Top/Cap Type: 20mm Crimp top/Bevelled Parts: Vial Vial Volume(ml): 10 Color: Clear Size: 22.5*46mm Bottom Type: Flat Vial Diameter: 22.5±0.5mm Vial Height: 46±0.5mm Screw Diameter: 19.6±0.25mm Mouth Diameter: 12.6±0.25mm Base thickness: 0.8±0.2mm Application:1. Small objects, please stay away from children under 3 years old. 2. The vials are NOT sterile, but they can be heated and boiled to be sterile. Temperature range: -200°C to 200°C(-328℉ to 392℉). 3. Resistant to pressure up to 600kPa to ensure cap stays on during volatile sample analysis. 4. Customer Service: If you have any questions about our products, please send us an email, we will reply you within 24 hours. Package Included: 100pcs: 100x Heardspace Vials (Caps not included) 200pcs: 300x Heardspace Vials (Caps not included) 400pcs: 400x Heardspace Vials (Caps not included) 600pcs: 600x Heardspace Vials (Caps not included) 800pcs: 800x Heardspace Vials (Caps not included) 1000pcs: 1000x Heardspace Vials (Caps not included) 2000pcs: 2000x Heardspace Vials (Caps not included)If you need the 20mm crimp top caps for this 10ml headspace sample vials, Please click here!!!On Jan 22, 2024 at 17:39:22 PST, seller added the following information:
LEER MÁS25PCS LAB 50ML CONICAL PP CENTRIFUGE TUBES POLYPROPYLENE STERILE BLUE SCREW CAPMembrane Solutions Conical Centrifuge Tubes 50mL, Clear Plastic Centrifuge Tubes with Leak-Proof Screw Caps, Plastic Graduated Lab Test Container for Scientific ExperimentsConical Centrifuge Tubes 50mL Our 50mL centrifuge tube is made of polypropylene, sterilized with no human DNA. It withstands high-speed centrifugation and stays sealed tightly, making it an ideal solution for centrifugal separation. Clear graduations measure liquid volume quickly, and the white writing area makes labeling the tubes easy. Our conical centrifuge tube comes with a test tube rack and Pasteur pipette, suitable for sample storage, separation, and analysisFeature: 🧪 TUBE MATERIAL: These 50ml centrifuge tubes are made in high purity PP Material. They are designed to have longer length screw caps with sealing rings to prevent leakage. Pack of 25. 🧪 EASY TO DISTINGUISH: Plastic centrifuge tubes also include a convenient white writing patch for easy marking and identification. The patches are nice for labeling. And the test clear tubes with screw caps. 🧪 EASY TO READ: Black graduations of plastic centrifuge tubes are accurate to ±2%, 1mL increments (total 50mL). So these lab centrifuge tubes are better for science experiments. 🧪 AUTOCLAVABLE AND FREEZABLE: Max. RCF: 9,400 for conical bottom tubes; it is autoclavable at 121℃/249.8℉ and freezable to -80℃/-176℉, successfully passed 95 KPa pressure test. 🧪 WIDE APPLICATIONS: Our plastic centrifuge tubes are general used in fields of biochemistry and molecular biology，such as separation and preparation of various biological samplesWIDE APPLICATIONS： Plastic centrifuge tubes are commonly used in the fields of biochemistry and molecular biology, such as separation and preparation of various biological samples. Specification:Model:Conical Centrifuge TubeMaterial:PolypropyleneCapacity:50mLMax. RCF:9400xgColor of Cap:BlueType of Cap:Screws CapType of Bottom:ConicalNumber of Items:25Pcs/BoxProduct Size:1.18″x1.18″x4.65″/ 3x3x11.8 cm Package List: 25pcs: 25x Centrifuge Tubes w/ Caps 50pcs: 50x Centrifuge Tubes w/ Caps 100pcs: 100x Centrifuge Tubes w/ Caps 200pcs: 200x Centrifuge Tubes w/ CapsPaymentDelivery detailsTerms of salesAbout usContact usPayment1. We accept PayPal only. 2. Payment must be received within 3 days from the date of purchase. Delivery details1. Orders will be processed & dispatched in 1 business day normally. 2. We ship to your eBay order or PayPal address. Please make sure your eBay order and PayPal address is correct before you pay. 3. Only ship to US mainland, other address need to be confirmed before you place order. 4. Estimated delivered time is 1-5 business days by USPS or FedEx usually. 5. If you do not received your package in the estimated time, please contact us freely. We would do our best to solve your problem of delivery. 6. Please note, we can ship to Alaska, Hawaii, US APO/FPO, US Protectorates areas, but you need pay for extra shipping fee. If you need to shipped to those areas, please contact us and we will help you to check the shipping fee. Terms of sales1. All the selling price do not includes import tax, sales tax, shipping fee etc.. 2. All the items can be returned within 30 days after you received them. 3. Returning items should include original package, invoice, accessories. About us1. Membrane Solutions is well established company in the United States in 2006 with great experience and specialists in water purification. Our water filter products are widely used in residential, commercial and industrial. 2. Membrane Solutions is committed to: Offering our customers exceptional selection and value. Provide the highest quality of service and products in the water treatment industry. Contact us1. If you are satisfied with our product or our service, please leave Positive Feedback and 5-stars ★★★★★. We are much appreciated for your help. 2. If you have any problem of the goods, please contact us before you leave any feedback to us. We promise trying our best to resolve your problem. 3. Our working time : 9:00am – 18:pm (Monday – Friday). Please feel free to email us for any questions or inquiry.
LEER MÁS(1) Low Expansion Coefficient: 9mm Screw Thread Autosampler Vials are made of clear Type 1, Class A Borosilicate Glass with very low expansion coefficient. It shows excellent chemical resistance to acidic and neutral solutions, due to its relatively low alkaline content even to alkaline solutions.
LEER MÁS2000pcs Clear Transparent PE Poly Gloves Powder Free Plastic Food Handling SafePE Clear Disposable Gloves Plastic Gloves Large Poly Gloves Hair Coloring Food Service Gloves for Cooking Kitchen Cleaning Food Handling Food Prep Gloves Disposable Latex Free GlovesDescription: 【MATERIALS】 Polyethylene gloves, no latex, no allergies.100 PCS/Box disposable plastic gloves, suitable for men/women, left hand and right hand, reference hand shape design,universal, flexible use, frosted surface with anti-slip and better grip! 【FEATURES】 Good toughness, large tension, easy to stretch, feel comfortable and smooth, not easy to wear, no hole leakage. These recyclable cooking gloves are the best choice for protecting hands from damage. 【APPLICATION】 These gloves are perfect for kitchen food handling, cooking, and cleaning. Deal with messy food such as grilling, cleaning and in any case, you don’t want to get your hands dirty, these disposable gloves can protect your hands. 【FOOD GLOVES】Gloves for food service . For commercial or domestic use, 100% perfect food handling. 【QUANTITY 】There are 100 PCS/Bag disposable cleaning gloves in one package. Easy to put on and easy to take off disposable kitchen service food preparation gloves,very convenient and easy.These clear gloves are made of high-density polyethylene, no holes and leakage; Good toughness and tension, easy to stretch, durable, not easy to break and tear. And they are safe, non-toxic, hygienic, are super light(0.2g per glove).Our disposable food-safe gloves are embossed on the surface embossing treatment, not only anti-skid, but also easy to grasp. Then can protect your hands from disinfectants, viruses and bacteria.Recommend for anyone who would like gloves when prepping food, or doing light clean-ups of your bathrooms, dyeing hair, cleaning up after our dogs and other light work when it’s dirty outside Package included: 1. 100Pcs PE Disposable Gloves 2. 200Pcs PE Disposable Gloves 3. 300Pcs PE Disposable Gloves 4. 400Pcs PE Disposable Gloves 5. 500Pcs PE Disposable Gloves 6. 1000Pcs PE Disposable Gloves 7. 2000Pcs PE Disposable Gloves Notice: WE do not accept return Gloves NO Return for gloves Due to safety proposePaymentDelivery detailsTerms of salesAbout usContact usPayment1. We accept PayPal only. 2. Payment must be received within 3 days from the date of purchase. Delivery details1. Orders will be processed & dispatched in 1 business day normally. 2. We ship to your eBay order or PayPal address. Please make sure your eBay order and PayPal address is correct before you pay. 3. Only ship to US mainland, other address need to be confirmed before you place order. 4. Estimated delivered time is 1-5 business days by USPS or FedEx usually. 5. If you do not received your package in the estimated time, please contact us freely. We would do our best to solve your problem of delivery. 6. Please note, we can ship to Alaska, Hawaii, US APO/FPO, US Protectorates areas, but you need pay for extra shipping fee. If you need to shipped to those areas, please contact us and we will help you to check the shipping fee. Terms of sales1. All the selling price do not includes import tax, sales tax, shipping fee etc.. 2. All the items can be returned within 30 days after you received them. 3. Returning items should include original package, invoice, accessories. About us1. Membrane Solutions is well established company in the United States in 2006 with great experience and specialists in water purification. Our water filter products are widely used in residential, commercial and industrial. 2. Membrane Solutions is committed to: Offering our customers exceptional selection and value. Provide the highest quality of service and products in the water treatment industry. Contact us1. If you are satisfied with our product or our service, please leave Positive Feedback and 5-stars ★★★★★. We are much appreciated for your help. 2. If you have any problem of the goods, please contact us before you leave any feedback to us. We promise trying our best to resolve your problem. 3. Our working time : 9:00am – 18:pm (Monday – Friday). Please feel free to email us for any questions or inquiry. On Apr 3, 2023 at 01:32:02 PDT, seller added the following information:
LEER MÁS(1) Low Expansion Coefficient: 9mm Screw Thread Autosampler Vials are made of clear Type 1, Class A Borosilicate Glass with very low expansion coefficient. It shows excellent chemical resistance to acidic and neutral solutions, due to its relatively low alkaline content even to alkaline solutions.
LEER MÁS