Cartridge Check Valve Housing, 2/pk Back Catalog number: CTS-21010 Manufacturer: SCIENCIX Availability: In the manufacturer's stock Price on request - + Recommended 11-3883 Needle Assembly Price on request CTS-21347 Plunger Seal Price on request 11-4181 Seal Wash (0.0787 ID, Fixed), 2/pk Price on request