Filter, 37mm, 0.4µm, Polycarbonate, Plain White, 1 Back Catalog number: GFPC4537 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 800556 Pump Filter Kit (3 Filters, 3large o-rings, 3 sma Price on request 910-0906-EU-R GilAir-Plus STP 5-Pump Starter Kit, Euro cord Price on request 800883-171 GilAir-5 R Pump, No Charger Price on request