Features & Benefits For use in R-134a and R-1234yf systemsSuper concentrated dye detects leaks quickly, saving time and moneyAdded friction modifier and anti-wear additive improves efficiency and reduces wearAntioxidant stops acid formation and prolongs oil lifeCartridge works exclusively with the Spotgun Jr.™ injection systemUnit Size: 1 oz/30 mlMax. Applications: 40 vehiclesQuantity: 4