Whatman® GD/X syringe filters glass microfiber membran, pore size 0.45 μm, diam. 25 mm, non-sterile, pk of 150 ea; Synonyms: syringe filter,syringe filters,Whatman filter,Z277347; find -WHA68942504 MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldrich