MASTERCOOL 55310 Electronic Leak Detector with UV Light and Dye Kit, Blue/Gray UV Dye Injector W/10 Application Dye Cartridge Dye injection Connection Hose W/R12 Adapter Detects all refrigerants (CFC's, HCFC's, HFC's) Meets SAE J1627 and CE Conformity 6 Levels of Sensitivity (15 Levels of Detection)