Johnsens 12 OZ R-134A. Automobile A/C Refrigerant Plus UV Dye. Fast & Easy Method To Recharge & A/C System & Detect Leaks Using UV Dye. May Be Used In Any Vehicle That Uses R-134A Refrigerant Including Systems That Were Originally Equipped With R-134A & Those That Have Been Retrofitted From R-12 To R-134A.