Filter, 37mm, 0.4µm, Polycarbonate, Plain White, 1 Back Catalog number: GFPC4537 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9927-06 Cyclone, GK 2.69 25mm O-Ring Kit Price on request 800556 Pump Filter Kit (3 Filters, 3large o-rings, 3 sma Price on request 811-1004-04 PM-4.0 Impactor Kit, Replacement for Models 810-10 Price on request