Check Valve Cartridge, 2/pk Back Catalog number: CTS-A094 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-6809 Mobile Phase Transfer Line, TFE, 3/16" OD x 1/8" I Price on request CTS-A11095 Check Valve, Double Ball & Seat Price on request CTS-21145 Inlet Check Valve Price on request