Check Valve Cartridge, 2/pk Back Catalog number: CTS-10600 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended 11-2529 Screw, Comp., 10-32, 304SS, (Gold-Plated), 10/pk Price on request 11-1600 Check Valve, Secondary Inlet Price on request CTS-21192 Cartridge, BioAcquity, I2V Price on request