Check Valve Cartridge, Ceramic Ball & Seat, 2/pk Back Catalog number: 11-2401 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-10319 Sapphire Plunger Price on request 11-4121 Ceramic Plunger Holder Assembly, LC-10ADvp Price on request CTS-00230-02 O-Ring, PTFE Price on request