- Complete AC Gauges Set: This R1234yf and R134a gauge set includes everything you need for efficient refrigerant management: 1 four-way gauge, 4 color-coded hoses, adjustable R1234yf and R134a quick couplers, self-sealing can taps for both refrigerants, and two adapter options (1/4'' Female to 1/2'' Male for both left and right-hand threads). - Versatile Measurement: The professional 4-way automotive AC manifold gauge is compatible with R1234YF, R134A, and R404A refrigerants. The easy-to-read colored dials allow for quick pressure checks, while the integrated sight glass enables you to monitor the refrigerant filling process clearly. - Color-Coded Hoses for Safety: The hoses are designed for specific functions: blue for low pressure, red for high pressure, yellow for charging, and black for vacuum pump connections. Each hose can withstand up to 800 psi pressure and features a reinforced four-layer design for durability and safety, with a burst pressure of 4000 psi. - Built to Last: The gauge features a robust dial plate protected by an upgraded rubber shell, ensuring it can withstand heavy usage and accidental drops. High-quality rubber hoses and premium brass fittings enhance the longevity and performance of the entire set. - Practical Applications: Ideal for automotive technicians or DIY enthusiasts, this gauge set helps you efficiently service air conditioning systems in a variety of vehicles. It is particularly useful for recharging refrigerants, diagnosing AC system issues, and performing regular maintenance. - Compatibility and Convenience: The set's design ensures compatibility with a wide range of AC systems, making it a versatile tool for any technician or home mechanic. With easy-to-use components and clear instructions, you can confidently tackle AC repairs and maintenance.