ITEM NAME:10-1 / 2 inch R134A Ac Automotive Air Conditioning Refrigerant Supply Charg P4J1 10-1 / 2 inch R134A Ac Automotive Air.3.Built-in safety valve to prevent accidental venting of refrigerant. W.P. 3000 (211.26 KG/cm2) Burst. Plastic quick connector can be interfaced with the low pressure side car air conditioning system.