Filter Cassette Holder Kit (required when sampling Back Catalog number: 800143 Manufacturer: SENSIDYNE Availability: 3 weeks Price on request - + Recommended 801453 O-Ring/Gasket Kit, GilAir-5 Price on request 800093-3 Inlet Filter Replacement Kit, LFS-113 (Packg of 3) Price on request 910-0801-04 Gilian 5000 5-Pack, UL ATEX 120V/240V , No Cord Price on request