Go-Cal Replacent Filter Back Catalog number: 811-9917-01 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 800320-1 Air Boss & Restrictor Kit, GilAir-3/GilAir-5 and B Price on request 801446 Side Anti-Tamper Plate GilAir-3/5 Clock & Prog Mod Price on request 200457 Hose Support Tip, Aircon-2 Price on request