Filter Cassette Holder Kit (required when sampling with Cassette) Back Catalog number: 800143 Manufacturer: SENSIDYNE Availability: 3 weeks Price on request - + Recommended 811-0945-01-R GilAir Plus, DL to STP Upgrade (factory only) Price on request 800140 NEEDLE VALVE with O-rings for LFS-113 and LOW FLOW MODULE Price on request 811-9976-20 Sorbent Tube, XAD-2, 6X110, 150/75, 20/BX Price on request