• Quick coupling adapter kit R1234YF to R134A, designed for recharging, diagnostics, recovery, and evacuation of automotive air conditioning systems. • Includes: 1 red high-pressure quick coupler R1234YF (17 mm), 1 blue low-pressure quick coupler R1234YF (14 mm), 1 high-pressure quick adapter R134A (16 mm) with red cap, and 1 low-pressure quick adapter R134A (13 mm) with blue cap. • Made of high-quality brass, with a robust and durable structure, resistant to oxidation, deformation, and breakage. • Deep and precise internal and external threads for a perfect and secure fit. • Smooth and delicate surface that does not harm hands and maintains its color. • Design with ball lock and green rubber sealing ring to ensure tightness and prevent leaks. • Allow conversion between quick couplers and vehicle connection ports, as well as connection of hoses of different diameters. • Suitable for use in refrigerant recharge tubes, oil injectors, manifold gauges, and diagnostic, recovery, and evacuation work. • Easy to install and remove thanks to the automatic lock design and knurled grip rings.