Filter, 37mm, 0.4µm, Polycarbonate, Plain White, 1 Back Catalog number: GFPC4537 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 910-0902-EU-R GilAir-Plus Data Logging Single Starter Kit, Euro Price on request 800508-171-2305 GilAir-3 RC Pump, 5-Pack with Universal 5-Unit Cha Price on request 800884-171 GilAir-5 RP Pump, No Charger Price on request