GilAir Plus, DL to STP Upgrade (factory only) Back Catalog number: 811-0945-01-R Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9950-01 Cyclone Calibration Jar (For FSP-10 Cyclone) Price on request 201050-100 Filter, Replacement (Packg of 100), GilAir-3/GilAi Price on request 811-9929-01 Inhalable Dust Sampler, GSP-3.5 Conical Style (100 Price on request