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, ketone, benzen, having very wide chemical compatibility, can be used to remove micron structured particles and bacterial in all kinds of solutions