High Quality: The quick couplers kit is made from aluminum and copper materials, which is safe, durable and corrosion resistant. The smooth and delicate surface of the product does not hurt your hand and is not easy to fade. More importantly, it workseven in extreme heat and rain or snow, and is not subject to temperature deformation or rust. Excellent Sealing Function: R1234YF quick couplers kit has a built-in rubber ring for a good seal. It can effectively prevent dust, dirt, debris or moisture from entering air conditioning system exhaust pipe and prevents any harmful corrosion or damage,thus enhancing the operating efficiency of the air conditioning exhaust pipe. Wide Usage: The quick couplers kit is widely used. Not only can it convert R134A to R1234YF, but it can also be used with the 3-way R1234YF/ R134A AC manifold pressure gauge kit. In addition, it can also be widely used in automobile freon charging hose,air conditioner injector, refrigerator freon charging. Package Includes: You will receive 4 pieces R1234YF quick connect kit. It includes two R1234YF quick connectors and two R1234YF quick plugs. Our product has standard specifications and excellent performance. When you have it, you can easily meet theparts replacement needs and provide great convenience for your work. Easy Installation: Installing the R1234YF quick couplers is extremely simple. It can be done in 30 seconds without any installation tools. When installing, you just need to plug the R1234YF quick coupler directly into the automotive air conditioningsystem exhaust pipe.