Check Valve Cartridge, Ceramic Ball & Seat, 2/pk Back Catalog number: 11-2401 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-0037 Tube, Left Inlet Pigtail Price on request CTS-10532 Seal Wash Face Seal Price on request CTS-10788-5 Needle Wash Frit, 5/pk Price on request