Filter, 37mm, 0.4µm, Polycarbonate, Plain White, 1 Back Catalog number: GFPC4537 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9917-02 Go-Cal Replacent Tubing Kit Price on request 811-1004-02 PM-10 Impactor Kit, Replacement for Models 810-100 Price on request 201044-10 Filter Housing, Front, GilAir-3/GilAir-5 Price on request