UPLC Check Valve, Double Ball & Seat, 2/pk Back Catalog number: CTS-A11095-02 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended 11-3321 Wash Seal Gasket, 6/pk Price on request CTS-10759 Piston Seal Backup Ring Price on request CTS-11091 ACQUITY BSM Performance Maintenance Kit Price on request