Cartridge Check Valve Housing, 2/pk Back Catalog number: CTS-21010 Manufacturer: SCIENCIX Availability: In the manufacturer's stock Price on request - + Recommended 11-2891 PTFE Diaphragm, 2/pk Price on request CTS-21406 Peristaltic Pump Cartridge, WPS/AC Price on request CTS-A11095 Check Valve, Double Ball & Seat Price on request