Go-Cal Replacent Filter Back Catalog number: 811-9917-01 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 783-0018-01 Battery Pack, Gilian 12 (NiMH) Price on request 800148 Manifold Kit, Dual, 6 x 70mm (Standard Charcoal Tu Price on request 811-0945-02-R GilAir Plus Basic or DL to STP BlueTooth and Motio Price on request