Whatman® GD/X syringe filters Nylon membrane, pore size 0.45 μm, diam. 25 mm, non-sterile, pkg of 150 ea; Synonyms: syringe filter,syringe filters,Whatman filter,Z277363; find -WHA68702504 MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldrich