Cartridge Check Valve Housing, 2/pk Back Catalog number: CTS-21010 Manufacturer: SCIENCIX Availability: In the manufacturer's stock Price on request - + Recommended CTS-6613 Black Plunger Seal Price on request CTS-11149 Needle Seal O-Ring, 002 Kalrez Price on request CTS-00230-02 O-Ring, PTFE Price on request