Cartridge Check Valve System Kit Back Catalog number: CTS-21011 Manufacturer: SCIENCIX Availability: In the manufacturer's stock Price on request - + Recommended 11-4116 Sample Needle Kit, 15µL Price on request 11-4052 Needle Seal, SIL-30AC, SIL-30ACMP Price on request CTS-21480 Check Valve, Cartridge Price on request