0.22 um ptfe filter Pall Acrodisc Pall Acrodisc Syringe Filters, 25mm, Pall Life Sciences Combining top-notch and uncompromising quality with an affordable price, the Pall Acrodisc Syringe Filters, 25mm, Pall Life Sciences Nylon Membrane 4438/ 28143-948 can fulfill your laboratory needs while still offering a great value for the money.