Whatman® GD/X syringe filters polypropylene membrane, pore size 0.45 μm, diam. 13 mm, non-sterile, pk of 150 ea; Synonyms: syringe filter,syringe filters,Whatman filter,Z277320; find -WHA68781304 MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldrich