Whatman® Puradisc 25 syringe filters 0.2 μm, PTFE, 50/p [] Whatman® Puradisc 25 syringe filters 0.2 μm, PTFE, 50/pk; Synonyms: Whatman filter,disposable syringe filters,Whatman filters,Z672637; find -WHA67842502 MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldrich