PTFE Diaphragm, 2/pk Back Catalog number: 11-2891 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-21011 Cartridge Check Valve System Kit Price on request PL7025600 MarvelXACT PLS 25µm x 600mm Price on request CTS-10985 600/610 Performance Maintenance Kit Price on request