Filter, 37mm, 0.4µm, Polycarbonate, Plain White, 1 Back Catalog number: GFPC4537 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 800508-171 GilAir-3 RC Pump, No Charger Price on request 911-9901-NO-R Single Unit Charger w/ Power Adapter, USB GilAir-3 Price on request 910-0909-NO-R GilAir-Plus STP 3-Pump Starter Kit, No cord Price on request