PTFE Diaphragm, 2/pk Back Catalog number: 11-2891 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended 11-1599 Check Valve Assembly, Outlet Price on request CTS-10532 Seal Wash Face Seal Price on request CTS-2294-04 Plunger Seals, 4/pk Price on request