Filter, 37mm, 0.4µm, Polycarbonate, Plain White, 1 Back Catalog number: GFPC4537 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 911-9901-EU-R Single Unit Charger w/ Power Adapter, USB GilAir-3 Price on request 811-1004-02 PM-10 Impactor Kit, Replacement for Models 810-100 Price on request 911-0301-NO-R Single Unit Charger w/ Power Adapter, USB, LFS-11 Price on request