Check Valve Cartridge, 2/pk Back Catalog number: CTS-10600 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-21011 Cartridge Check Valve System Kit Price on request CTS-10693 Plunger Seal Price on request CTS-21155 Capillary, 300mm x 0.17mm ID, w/Fittings Price on request