Check Valve Cartridge, Ceramic Ball & Seat, 2/pk Back Catalog number: 11-2401 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended 11-4150 Tubing D-R Assembly Price on request CTS-11371 ACQUITY I2V BSM Performance Maintenance Kit Price on request CTS-0720 Inlet Check Valve Assembly Price on request