Interdynamics A/C Pro Auto Refrigerant Recharge & Retrofit Kit (Two 15 oz. cans) Kit Includes two 15 oz. cans of R-134a refrigerant, reusable charging dispenser, and a retrofit adaptor package Replaces lost refrigerant and oil to automotive A/C systems which cools vehicle's interior providing maximum cold air Seals A/C system leaks, protects & extends A/C compressor life by helping to eliminate moisture and acid buildup Reusable charging dispenser features an easy-to-read gauge with dial-in temperature, extra-long heavy duty hose, easy-squeeze trigger and 90 degree "Quick-Connect" Retrofit Valve Adapters convert older R-12 low and high pressure A/C ports to R-134a