Check Valve Cartridge, Ceramic, 2/pk Back Catalog number: CTS-21463 Availability: In the manufacturer's stock Price on request - + Recommended 11-4181 Seal Wash (0.0787 ID, Fixed), 2/pk Price on request CTS-00230-02 O-Ring, PTFE Price on request PS7050350 MarvelXACT™ PEEKsil™ 50µm ID x 350mm Price on request