Ahlstrom 6420-1850 Qualitative Filter Paper, 2 Micron, Medium Flow, Grade 642, 18.5cm Diameter (Pack of 100)
Syringe filters PES:Sterile Polyethersulfone (PES) needle filters have Polyethersulfone microporous membrane,sterile syringe filters are made with PES membrane filters with polypropylene (PP) housing.