Check Valve Cartridge, 2/pk Back Catalog number: CTS-A094 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-21163 Rotor Seal, 2-Groove Price on request CTS-21109 Capillary, 600mm x 0.17mm ID Price on request CTS-10761 HPMV 1 & 2 Rebuild Kit w/Spool Price on request