Cartridge Check Valve System Kit Back Catalog number: CTS-21011 Manufacturer: SCIENCIX Availability: In the manufacturer's stock Price on request - + Recommended CTS-21564 Needle, Uncoated 10 Series Price on request CTS-A11342 Tube Assembly, Transducer to Check Valve Price on request CTS-12013 Tungsten Lamp (1000 hr) Price on request