R-134a Multiple Car Kit 3 Cans Johnsen's Refrigerant R-134a Can Tap with Gauge This kit is designed to Boost your A/C system to Full Capacity. The refrigerant is "pure" R134 from Johnsen's. The can tap is reusable and fits onto all R-134a Refrigerant, Oil Charge, and Stop Leak Cans. The connecting end will fit on all standard R-134a Low Side Ports.