Incorporates a built-in two way valves cores that automatically closes upon disconnection to refrigerant leakage Features a 1/4inch standard interfaces, ensuring compatibility with a wide ranges of refrigerant filling equipment easily refrigerants recharging with our quick coupler, essential tool for efficient fridge maintenance and repair Multifunctional tool suitable for vacuum, and pipe cleaning, and pressure relief Crafted from brass and iron, this coupler features a leak proof design, ensuring a secure and connection to your refrigerator's charging pipeline