Filter, 37mm, 0.4µm, Polycarbonate, Plain White, 1 Back Catalog number: GFPC4537 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-0905-01-R Inlet Filters, Replacement for GilAir Plus, Pack o Price on request 800883-171 GilAir-5 R Pump, No Charger Price on request 811-9950-01 Cyclone Calibration Jar (For FSP-10 Cyclone) Price on request