Check Valve Cartridge, 2/pk Back Catalog number: CTS-A094 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended 11-4060 Inlet Check Valve Price on request CTS-A11133 Tube Assembly, Transducer to Check Valve Price on request 11-4181 Seal Wash (0.0787 ID, Fixed), 2/pk Price on request