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 GCAOC10 Cassette, Air-O-Cell 10/Box Price on request 615-0908-05-R Carrying Case, Hard Side, for GilAir Plus 3-pack Price on request