Certified 0.22 um ptfe filter Pall Acrodisc Pall Acrodisc® Syringe Filters with Supor® Membrane, Sterile, 0.2 Name:Pall Acrodisc® Syringe Filters with Supor® Membrane, Sterile, 0.2 µm, 25 mm, Availability:Yes, Special Discount:No, Category:Pore size: 0.22uM.