PTFE Diaphragm, 2/pk Back Catalog number: 11-2891 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-10693 Plunger Seal Price on request CTS-10600 Check Valve Cartridge, 2/pk Price on request CTS-A11145 Tube Assy, System Outlet, SDS Price on request