Check Valve Cartridge, Ceramic Ball & Seat, 2/pk Back Catalog number: 11-2401 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-10391 Plunger Wash Seal Price on request 11-3321 Wash Seal Gasket, 6/pk Price on request CTS-A11094-02 UPLC Primary Check Valve Assy, 2/pk Price on request