Check Valve Cartridge, 2/pk Back Catalog number: CTS-10600 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-A11151 Needle Assembly, PEEK™ Price on request CTS-A125 Inlet Check Valve Assembly Price on request CTS-11141 ACQUITY SM Performance Maintenance Kit, 700005236 Price on request