Filter Cap, Replacement for Nephelometer Back Catalog number: 385-0113-01 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended GFPC4537 Filter, 37mm, 0.4µm, Polycarbonate, Plain White, 1 Price on request 200260-25 Filter-25Pk, Internal LFS Price on request 801453 O-Ring/Gasket Kit, GilAir-5 Price on request