Tube Assy, Transducer to Check Valve, I2V Back Catalog number: CTS-A11372 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-10600 Check Valve Cartridge, 2/pk Price on request CTS-8068 Quartz Lens Price on request CTS-10985 600/610 Performance Maintenance Kit Price on request