Filter, 37mm, 0.4µm, Polycarbonate, Plain White, 1 Back Catalog number: GFPC4537 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 800320-1 Air Boss & Restrictor Kit, GilAir-3/GilAir-5 and B Price on request GH37C Housing, 37mm, Conductive 3pc, 50/Box Price on request GH37 Housing, 37mm 3pc Opaque, 50/Box Price on request