Ks-Tek 30Pcs Syringe Filters Nylon Membrane 13Mm Diameter 0.22?M Pore Size Product Details FEATURE: APPLICATION: Diameter:13mm,pore size:0.22um,30pcs Nylon is hydrophilic membrane and an extremely clean and strong membrane with very low extractable levels. It is a good 'workhorse' membrane choice where acidic samples are not involved. The Uniform aperture structure of filter nylon membrane offers a high dirty loading capacity, higher through-puts and higher flow rates. premium virgin polypropylene housing and welded with a high-quality membrane, so you can be sure your filter will never leak sample solvent. Connectors:Inlet?Female luer,Outlet:male slip luer 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.