Sterile Nylon Syringe Filters, 25MM diameter disc, 0.22uM (Cat# SFNY025022S) and 0.45uM (Cat# SFNY025045S) pore sizes. Individual packed. 100/Pack. Free ground shipping on orders $200 and up. Nylon membrane has naturally hydrophilic characteristic that it can be used to filter most organic solvent, such as alcohols, hydrocarbons, ethers, esters