Filter Cassette Holder Kit (required when sampling Back Catalog number: 800143 Manufacturer: SENSIDYNE Availability: 3 weeks Price on request - + Recommended GFPC4537 Filter, 37mm, 0.4µm, Polycarbonate, Plain White, 1 Price on request 911-9901-NO-R Single Unit Charger w/ Power Adapter, USB GilAir-3 Price on request GF47500PVC Filter, PVC, 5.0µm 47mm, 100/Pack Price on request