Cartridge Check Valve Housing, 2/pk Back Catalog number: CTS-21010 Manufacturer: SCIENCIX Availability: In the manufacturer's stock Price on request - + Recommended CTS-11435 Seal, Needle PEEK™ Price on request CTS-A11094-02 UPLC Primary Check Valve Assy, 2/pk Price on request CTS-10391 Plunger Wash Seal Price on request