【R1234yf Quick Coupler Kit】Includes 1 red R1234YF high pressure quick coupler (1/4" Sae female thread x 17mm r134a high pressure quick coupler) and 1 blue R1234YF low pressure quick coupler (1/4" Sae female thread x 14mm r134a low pressure quick coupler), connecting the high and low pressure side quick couplers respectively, for conversion between quick couplers and vehicle connection ports. 【Premium Material】The R1234yf refrigerant recharging kit is made of high quality brass material. Stable structure, exquisite workmanship, long service life, not easy to rust, deform or break! Thicker and stronger material makes it stable even under extreme conditions such as high temperature and pressure. 【Leak-Proof Design】Our r1234yf to r134a conversion kit is designed for leak-proof connections with precision threads on the connection part, and the design of rubber seals inside the fittings provides a secure and leak-free connection. 【Easy to Use】The r1234yf to r134a adapter kit R134a with