Check Valve Cartridge, Ceramic Ball & Seat, 2/pk Back Catalog number: 11-2401 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-21045 SUS Tubing A Price on request 11-4122 PTFE Diaphragm, LC-30AD/i-Series, 2/pk Price on request CTS-10597 Wash Tube Seal Kit, 4/pk Price on request