Check Valve Cartridge, 2/pk Back Catalog number: CTS-10600 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended 11-1600 Check Valve, Secondary Inlet Price on request CTS-10711 Alliance Head Plunger Seal Kit, Black, 2/pk Price on request CTS-A11381 Needle, SS, 30μL Price on request