Filter, 37mm, 0.4µm, Polycarbonate, Plain White, 1 Back Catalog number: GFPC4537 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 297-0012-01 USB Communications Cable for Nephelometer Price on request 910-0909-NO-R GilAir-Plus STP 3-Pump Starter Kit, No cord Price on request 800256 Single Variable Flow Kit, 7-10 x 150mm Price on request