Check Valve Cartridge, Ceramic Ball & Seat, 2/pk Back Catalog number: 11-2401 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-A138 Ceramic Plunger Assembly Price on request CTS-11265 Kit S200 Standard Pump Seals Price on request CTS-0621 Inlet Check Valve Cartridge Price on request