Filter, 37mm, 0.4µm, Polycarbonate, Plain White, 1 Back Catalog number: GFPC4537 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 910-0202-02 GilAir-3 Basic [ATEX], 5-Pack (With Universal 5-Un Price on request 375-0009-01 Carrying Case for Nephelometer Price on request 801980 Fixed Mount Assembly, for Gilian 5000Low Flow Ada Price on request