Filter, 37mm, 0.2µm, Polycarbonate, Plain White, 1 Back Catalog number: GFPC0237 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended GFPC447 Filter, 47mm, 0.4µm, Polycarbonate, Plain White, 1 Price on request 385-0113-01 Filter Cap, Replacement for Nephelometer Price on request 811-0916-01-R Inlet Filter Replacement Kit for GilAir Plus with Price on request