Shop › 820603 - Membrane, 25 mm, Polypropylene for Gas Diffusion, 12-pk 820603 - Membrane, 25 mm, Polypropylene for Gas Diffusion, 12-pk $91.84 FIAlab PN 820603 FIAlab PN 820603 Quantity: Add To Cart Added! You Might Also Like 17047 - Bulb for HL-2000-LL $217.73 24055 - 4-Way Manual Switching Valve with Diagonal Flow $215.67 82060 - Polypropylene gas diffusion membrane tape kit (12-pk) $170.27 79167 - Flow Cell Window Replacement Kit: 2 Teflon seals, 2 o-rings, 2 SMA connectors, 2 jam nuts, 2 silica flow cell windows $172.33 820607 - Membrane, 25 mm, PTFE for Gas Diffusion, 12-pk $91.84