R1234yf Quick Couplers Kit, R1234YF to R134A Quick Coupler Adapter, High/Low Pressure Side AC Charging Hose Adapter Fitting Connector for R1234yf System Refrigerant Recharge Low Side Adapter: The blue R1234YF Low Side Quick Coupler features a 14mm female connection on one end and a 1/4" SAE male connection on the other, specifically designed for the low-pressure side of R1234YF systems. Additionally, the R12 to R134a Adapter Connector is equipped with a 1/4" SAE female end that connects seamlessly to a low-pressure 13mm R134A quick coupler. High Side Adapter: The red R1234YF High Side Quick Coupler boasts a 17mm female connection paired with a 1/4" SAE male connection, tailored for use on the high-pressure side of R1234YF systems. Meanwhile, the R12 to R134a Adapter Connector includes a 1/4" SAE female end that mates perfectly with a high-pressure 16mm R134A quick coupler. Pressure Durability: Engineered with robust materials and meticulous sealing, the adapter hose fittings are capable of enduring both high and low pressures within refrigeration systems, ensuring operational reliability and safety. Good sealing: The integration of a ball lock design with a rubber seal ensures superior sealing capabilities. The R134a to R1234yf Conversion Kit features an automatic closing mechanism, facilitating easier and more streamlined disassembly and installation processes. Application: This quick coupler, designed for both low and high sides, allows for the seamless transition between R1234YF/R12 and R134A refrigerants in automotive air-conditioning systems. It is ideally suited for AC charging, handling R1234yf refrigerants, utilizing AC manifold gauges, conducting diagnostic checks, as well as performing recovery and evacuation tasks.