Check Valve Cartridge, 2/pk Back Catalog number: CTS-10493 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-21243 1/16'' Ferrule set, 2/pk Price on request CTS-10476 Sapphire Plunger, Alliance Price on request CTS-21287 Needle Kit, 15 µL with Needle Seat and Needle Guid Price on request