ITEM NAME:R134A Car Ac Refrigerant Charge Hose Kit Recharge Hose with Gauge, A/C 1/2 V3Z1 R134A Car Ac Refrigerant Charge Hose Kit Recharge Hose with Gauge, A/C 1/2 V3Z1 1/2 Thread for American and Europe.Metal valve with 1/2 inch fitting. The connector to the Freon gas tank is adjustable. This System Refrigerant Charging Pipe with built-in safety valve to prevent accidental venting of refrigerant. The hose adopted high quality rubber material, high pressure resistance and reliable. For use in adding R134A refrigerant to vehicle or home air-.This System Refrigerant Charging Pipe with built-in safety valve to prevent accidental venting of refrigerant. 1 Car R134A Refrigerant Charging Pipe. 3.Built-in safety valve to prevent accidental venting of refrigerant.