Detail Size: 1 PC x Red High Pressure R1234YF Quick Coupler: 17 mm 1 PC x Blue Low Pressure R1234YF Quick Coupler: 14mm 1 PC x High Pressure R134A Quick Adapter with Red Cap: 16 mm 1 PC x Low Pressure R134A Quick Adapte with Blue Cap: 13 mm A must-have for automotive professionals-the R1234YF Quick Couplers Kit The high and low-pressure R1234YF quick couplers are not only compatible with R134A quick couplers, allowing seamless conversion from R134A to R1234YF, but also perfect for 3-way R1234YF or manifold gauge setups. They are widely compatible with all car models using R1234YF refrigerant.Perfect for AC charging, diagnostic checks, recovery, evacuation work, and even AC oil injection. These quick couplers are crafted from premium solid brass, ensuring durability and excellent performance even in extreme conditions like high temperature and high pressure. The precision thread knurled grip ring and 6 sealing balls lock design, along with the rubber seal, guarantee a secure and leak-free connection. The automatic closing function simplifies the disassembly and installation process. Experience efficiency and reliability with the R1234YF Quick Couplers Kit, With standard specifications and excellent performance, it can provide great convenience for your work.