Check Valve Cartridge, Ceramic, 2/pk Back Catalog number: CTS-21463 Availability: In the manufacturer's stock Price on request - + Recommended 11-4052 Needle Seal, SIL-30AC, SIL-30ACMP Price on request CTS-21421 PM Kit, 1290 Binary Pump Price on request CTS-00230-02 O-Ring, PTFE Price on request