Corning® syringe filters sterile, cellulose membrane (surfactant-free with prefilter), diam. 28 mm, pore size 0.2 μm; Synonyms: syringe filters,disposable syringe filters,sterile syringe filters; find -CLS431218 MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldrich