U V Inspection Flashlight, Aluminum, Maximum Lumens Output: 6100, Black, 5.50"

Simple-to-use kit allows you to pinpoint leaks in most air conditioning and refrigeration systems. Just add the appropriate florescent dye (sold separately) and run the system to circulate the compound. Scan the system with the special leak detection flashlight while wearing the fluorescence-enhancing glasses. A bright florescent glow indicates the location of a refrigerant leak.