Shop › 820607 - Membrane, 25 mm, PTFE for Gas Diffusion, 12-pk 820607 - Membrane, 25 mm, PTFE for Gas Diffusion, 12-pk $117.98 FIAlab PN 820607 FIAlab PN 820607 Add To Cart Added! You Might Also Like 240370 - Backpressure cartridge, 20 psi $179.62 79150 - Flow Cell Window Replacement Kit: 6 Teflon seals and 2 silica flow cell windows $103.10 41220 - Pressure Lever Cassette/Cartridge for FIAlyzer-1000 Peristaltic Pump $183.88 82063 - C type dialysis membrane, pre-mounted, 12-pk $226.39 53004 - Valve Rotor: 6-port injector, Valcon E2 $109.48