1、SELF SEALING FUNCTION: This R1234yf air conditioning quick coupler has a self sealing and puncture design, ensuring that the refrigerant will not leak when not in use, improving efficiency and saving money. 2、WIDE COMPATIBILITY: R1234yf quick coupler is suitable for both R134a and R1234yf car air conditioning systems, making it can serve a variety of air conditioning systems. 3、HIGH AND LOW PRESSURE DESIGN: R1234YF adapter includes high and low pressure quick couplings, unique design, easy to use, can be connected quickly and without leakage, making refrigerant charging more convenient. 4、BRASS MATERIAL: R1234YF adapter is made of premium brass, erosion resistant, high pressure resistant, can withstand high temperatures, ensuring reliable usage over time 5、EASY INSTALLATION: R1234YF quick coupler kit is precision constructed for easy installation and usage, and can provide a lot of convenience for your daily use equipment.