Check Valve Cartridge, 2/pk Back Catalog number: CTS-10600 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended 11-4122 PTFE Diaphragm, LC-30AD/i-Series, 2/pk Price on request CTS-21109 Capillary, 600mm x 0.17mm ID Price on request CTS-10985 600/610 Performance Maintenance Kit Price on request