PTFE Diaphragm, 2/pk Back Catalog number: 11-2891 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-10600 Check Valve Cartridge, 2/pk Price on request CTS-10711 Alliance Head Plunger Seal Kit, Black, 2/pk Price on request CTS-21243 1/16'' Ferrule set, 2/pk Price on request