Pall Acrodisc Syringe Filters with Versapor Membrane, Sterile | Order Online at MIDSCI
At Least 11 Things You Didn't Know about Filtration (but you should, because you probably do it all the time) | Biocompare: The Buyer's Guide for Life Scientists
Acrodisc PF Syringe Filter with Supor Membrane, 0.8/0.2 um Pore Size, 25mm Diameter, Sterile, Pack of 50