Check Valve Cartridge, 2/pk Back Catalog number: CTS-10600 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended 11-2591 Needle Guide Price on request 11-3889 Needle Seat Assembly, 0.12mm ID Price on request CTS-21463 Check Valve Cartridge, Ceramic, 2/pk Price on request