Filter, 37mm, 0.4µm, Polycarbonate, Plain White, 1 Back Catalog number: GFPC4537 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-0920-01 Replacement Valve Caps (Pack of 2) Price on request 811-9917-02 Go-Cal Replacent Tubing Kit Price on request 811-0509-01-R USB Wall Power Adapter Price on request