Multifunctional tool suitable for vacuum, and pipe cleaning, and pressure relief Features a 1 / 4inch standard interfaces, ensuring compatibility with a wide ranges of refrigerant filling equipment Crafted from brass and iron, this coupler features a leak proof design, ensuring a secure and connection to your refrigerator ' s charging pipeline easily 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, Manufacturer: SHINLHUA