Check Valve Cartridge, 2/pk Back Catalog number: CTS-A094 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended 11-2891 PTFE Diaphragm, 2/pk Price on request CTS-10963 Gold Plunger Seal Price on request CTS-21421 PM Kit, 1290 Binary Pump Price on request