Filter, 37mm, 0.4µm, Polycarbonate, Plain White, 1 Back Catalog number: GFPC4537 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9950-01 Cyclone Calibration Jar (For FSP-10 Cyclone) Price on request 811-1710-01-R Gilibrator 3, High Flow Dry Cell (Flow Range 1 - 3 Price on request 810-0101-02 GilAir-5 Basic (ATEX), Pump only Price on request