Filter, 37mm, 0.4µm, Polycarbonate, Plain White, 1 Back Catalog number: GFPC4537 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 783-0008-03-R Battery Pack, GilAir-3UL, ATEX, NiMH Price on request 800843 Carrying Case, Hard Side, Deluxe (18" x 13" x 7"), Price on request 811-0507-01-R Power Adapter, Universal Wall w/USB A to USB B cab Price on request