1. Connnection: Each side is equipped with a brass 1/4 inch internal threaded joint for easy connection. The red hose connects the red 1/4 inch external threaded end of the gauge to the red, blue to blue quick connect fitting, and the yellow hose connects to the tank valve or vacuum pump. Three colors are easy to identify, with red indicating high pressure, blue indicating low pressure, and yellow indicating refrigerant bottles.
2. Adhesive Nylon Hose: Adopting 3 x 0.9m adhesive nylon hose, it is resistant, with low fluid resistance and high bearing pressure, ensuring durability and good sealing performance. The maximum working pressure is 500 PSI.
3. Resistance and Accurate Measurement : 3 way ac diagnostic manifold gauge set for freon charging is durable and resistant. Built in calibration screws and anti vibration pointers ensure measurement accuracy.
4. Blue and Red Low Pressure Gauge: The blue low pressure gauge has a range of ‑30 inHg to 220 PSI, and the red high pressure gauge has a range of 0 to 500 PSI in degrees Celsius.
5. Easily Readable Dial: The easily readable 7cm dial features color coded scales and an observation mirror on the instrument panel for better and easier control of refrigerant charging and recovery.
6. Channels and Manifold Valve: The blue and red channels are always open, the low pressure manifold valve controls the connection of the blue and yellow wires, and the high pressure manifold valve controls the connection of the red and yellow wires.

Specification:
Item Type: Air Conditioning Pressure Gauge
Material: Brass, PVC, Plastic
Weight: Approx. 1220g / 2.7lb

packing list:
1 x Air Conditioning Pressure Gauge
3 x Hose
1 x Hook
5 x Interface