Whatman® GD/X syringe filters PTFE membrane, pore size 0.45 μm, diam. 13 mm, non-sterile, pk of 150 ea; Synonyms: syringe filter,Z277304,syringe filters,Whatman filter; find -WHA68741304 MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldrich