"Pull the trigger to inject a precise amount of oil into the A/C system and you’re done","Allows for compliance with J2788 Standard for separate oil injection","Includes an injector, adapters and PAG oil needed for R-134a and R-1234yf systems","Also includes A/C ExtenDye, a premium dye which contains a solution of highly concentrated UV dye, friction modifier, anti-wear and antioxidant SPOTGUN™ OIL INJECTION MASTER KIT AC381550 | Matco Tools