Filter, 37mm, 0.4µm, Polycarbonate, Plain White, 1 Back Catalog number: GFPC4537 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-0945-01-R GilAir Plus, DL to STP Upgrade (factory only) Price on request 811-9927-08 Cyclone, 37mm Filter Screen Price on request 910-0915-NO-R GilAir-Plus STP 3-Pump Starter Kit, Bluetooth, No Price on request