Teflon Bag, Septum Valve (50L) Back Catalog number: TE-28 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9917-01 Go-Cal Replacent Filter Price on request 800883-171-2305 GilAir-5 R Pump, 5-Pack with Universal 5-Unit Char Price on request 810-0103-02 GilAir-5 Programmable (ATEX), Pump only Price on request