Interdynamics Certified A/C Pro VA-LH10 R-134a Retrofit Parts Kit (3 Adaptors) Complete air conditioning conversion adapter kit with 3 adapters One low side .44 inch port, one high side .38 inch port and 1 high side for 2 piece GM port. Fits all vehicles 1976  1995 including GM models 1991 and up For conversion of R12 to R134a Includes retrofit label