Check Valve Cartridge, 2/pk Back Catalog number: CTS-A094 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-00230-02 O-Ring, PTFE Price on request CTS-A11151 Needle Assembly, PEEK™ Price on request CTS-A11142 Tube Assy, Inject Outlet Price on request