UPLC Check Valve Assy, Spring Loaded Back Catalog number: CTS-21100 Availability: In the manufacturer's stock Price on request - + Recommended CTS-1010T O-Ring, TFE Price on request CTS-10761 HPMV 1 & 2 Rebuild Kit w/Spool Price on request CTS-10597 Wash Tube Seal Kit, 4/pk Price on request