Go-Cal Replacent Filter Back Catalog number: 811-9917-01 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended TE-23 Teflon Bag, On-Off Valve (4.7L) Price on request 615-0910-01 Cd with software, manuals and USB drivers Price on request 810-0301-02 LFS-113 D Pump, No Charger Price on request