This set of couplers offer you the best convenience to attach the manifold hoses onto the car during the diagnosis, charging or evacuation working. Special design is the advantage of this coupler connector, easy to install and use, beautiful and concise style is developed to get and vividly. It can be connected with hoses quickly and easily. This pair is needed between the car service ports and the manifold set or tools to do diagnosis charging etc! Features - Color: Random color. - Material: Plastic. - Size: 3.50 x 1.50 x 1.50cm/ 1.38 x 0.59 x 0.59 inch. - Quick couplers for refrigerant to be use in automobile. - Quick, and disconnect high flow. High and low couplers kit with colored knobs for easy identification. - Reliable and safe for access to systems even at working pressure. actuation eliminates possibility of refrigerant loss. - This adapter is use for connecting hose fitting to automobile refrigeration tank. - Adjustable function allows you to open and close easily by twisting the red/blue knob on the quick coupler adapters, rather than take them off from the service ports. Package list: 2 x air conditioner couplers