This tool is a R134A joint disassembly tool for car air conditioners. If there is a valve core leak, you can use this tool to replace the new valve core. The refrigerant in the air conditioning system not leak, and there is no need to re-vacuum and add refrigerant before refueling. Because you must re-vacuum and add refrigerant after replacing the valve core, this tool can that the refrigerant in the system not leak. Do not vacuum it again. [Product Function]: Replace the valve core without releasing the refrigerant [Product Description]: If the valve core of the car air conditioner leaks, you can use this tool to replace the new valve core. The refrigerant in the air conditioning system not leak, and there is no need to re-vacuum and add refrigerant before refueling. Because you must re-vacuum and add refrigerant after replacing the valve core, this tool can that the refrigerant in the system not leak. Do not vacuum it again. [Product Name]: R134a Valve Core Disassembly Tool (No Refrigerant) The Compatibility Is Just For Please Compare The Part Number With Your One Before Purchasing!, Weight: 1.37127526964 Pounds, Manufacturer: Yoeruers