ITEM NAME:R-12 to R-134a Retrofit Conversion Adapter Fitting 1/4 SAE Valves Kits P gtJ Bj.Retrofit couplers high and low pressure. Low pressure connection: 1/4 SAE. High pressure connection: 1/4 SAE. Type: A/C Charging Port Adapter. Charging port adapter R12 port to accept R134a 'Quick Disconnect'.