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 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 Incorporates a built-in two way valves cores that automatically closes upon disconnection to refrigerant leakage