Robinair 16355 Automotive UV Dye Injection System Robinair's No. 16355 UV Dye Injection System is exactly what you need to find automotive air conditioning leaks quickly and easily Ultraviolet dye is injected and circulated throughout the entire A/C system then seeps out with the refrigerant at the point of a leak Simple to use - just twist cartridges onto the injector gun, hook up to the service port, and pull the trigger to inject the dye into the A/C system Kit includes: Injection gun, R-134a hose, R-12 adapter, and four universal twist-on A/C dye cartridges - enough dye for 20 applications UV injection components only - does not include UV lamp