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 801453 O-Ring/Gasket Kit, GilAir-5 Price on request 800844-4-230 Gilibrator-2 Deluxe Diagnostic Kit, with Printer 2 Price on request 810-0203-02 GilAir-3 Programmable (ATEX), Pump only Price on request