Adamas-Beta 100 Pcs. Syringe Filter, Syringe Lab Filters,, Green. Product Details SPECIFICATION - Diameter: 25mm, pore size: 0.22?m, 100pcs PREMIUM MATERIAL - PES membrane with PP housing. Polyethersulfone microporous membrane belongs to hydrophilic membrane, with high flow rate and lowest protein adsorption. CHEMICALLY STABLE - PES syringe filter has high chemical and thermal stability, acid and alkali resistance, and high mechanical strength. UNIFORM PORE SIZE - The pore size distribution of the filter membrane is uniform, the porosity is high, and the filtering effect is good, easy to identify the filter membrane and pore size. APPLICATION - Widely used in science laboratories for filteration of small volume samples, such as protein, culture medium, additives, buffers and reagents. 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.