Check Valve Cartridge, Ceramic Ball & Seat, 2/pk Back Catalog number: 11-2401 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-12015 Rotor Seal & Pod Repair Kit, Vespel, 3-Groove, 3 p Price on request CTS-1106 Inlet Tube Assembly Kit Price on request CTS-21566 PM Kit, Seal Wash for Binary Pump G4204A Price on request