Certified A/C Pro R-12 to R-134a Retrofit Parts Kit with 3 Adapters is a R-12 to R-134a retrofit parts kit. Converts most R-12 to R-134a for pre-1976 vehicles and some late model imports. Includes 1 low side .44 inch valve 1 high side .38 inch valve 1 high side .44 inch valve high and low side caps EPA approved label and complete instructions.