20 Pack Syringe Filter Sterile Pes 0.22 Um Pore Size, 33 Mm Membrane Diameter, Product Details ?Sterile individually packed? - Polyethersulfone (PES) membrane syringe filter is the first choice for sterile filtration of culture media or serum. Recommended for sterilization of small volume samples, such as protein, culture medium, additives, buffers, reagents, and drugs. ?Hydrophilic membrane? - PES is an inherently hydrophilic membrane that wets out quickly and completely resulting in fast filtration with superior flow rates and high throughputs. ?Low protein binding? - PES is also extremely low protein binding minimizing the likelihood of target analyte binding. The low protein binding nature of the polyethersulfone membrane makes it well suited for biological sample preparation. ?High throughputs? - The highly asymmetric pore structure of Labfil PES flat membrane offers a high dirty loading capacity, higher through-puts and higher flow rates than symmetrical membranes. ?Applications? - PES membrane for aqueous solutions provides removal of fine particles, making it a versatile membrane for applications such as sample preparation, sterile filtration and infusion therapy. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.