1. Multifunctional AC Gauge Set for Professional Use This 3way automotive air conditioning diagnostic manifold gauge set is compatible with R1234YF, R134A, and R404A refrigerants, making it perfect for AC freon charging, evacuation, diagnostic checks, and recovery work. This car ac manifold gauge set is ideal for auto air conditioners, household AC units, and compressors. This auto ac gauge set is a versatile tool for HVAC maintenance and auto AC repairs 2. Precision Gauges with EasytoRead Dials Featuring extralarge, colorcoded dials with Fahrenheit units, this ac gauge set ensures clear visibility and accurate readings. The highpressure gauge (red) measures up to 500 PSI, while the lowpressure gauge (blue) measures up to 350 PSI. The sight glass design allows you to monitor refrigerant flow during charging, making this car ac manifold gauge set a reliable choice 3. HighQuality, Construction Built with durable brass and aluminum materials, this ac manifold gauge set is designed to withstand heavy use and accidental drops, provides effective protection against rust and corrosion. The oilfilled core resists wear and shock, while the dry dial ensures reliable performance in cold weather. ac r1234yf r134a 134a 1234yf gauge set 4. Complete Set with ColorCoded Hoses This ac gauge set includes 3 highimpact, 5foot hoses rated for 600 PSI working pressure and 3000 PSI burst pressure. The colorcoded hoses (red, blue, yellow) are reinforced with 4 layers for durability and come with 45degree bends for easy access. The ac gauge set also includes quick couplers, a selfsealing can tap, and adapters for hassle setup, making this manifold gauge set a complete solution for HVAC maintenance