Feature:1. Refrigerant refilling pressure gauge has accurate readings and the accuracy error of the pointer reading is 1.5.2. Using high‑quality copper + rubber materials, durable, wear‑resistant and corrosion‑resistant.3. Mainly used to measure fluoride pressure of refrigeration equipment, with fluoride tubes, convenient for adding refrigerant.4. Wide range of uses, suitable for filling a variety of refrigerants, such as for R12/R22/R134a/R404z/410a, etc.5. The size of the joint is 1/4 x 1/4 SAE, with sealing gaskets, firm connection, and no air leakage.Spec:Item Type: Air Conditioning Manifold SetMaterial: Copper + RubberColor: BlueWeight: Approx. 2600g / 91.7ozSize: Approx. 18x15x4cm / 7.1x5.9x1.6inPurpose: Fluoride Pressure Measurement in Refrigeration EquipmentAccuracy Error Level: 1.5Scope of Application: R12 / R22 / R134a / R404z / 410aConnector Specification: 1/4 x 1/4 SAEMaximum Pressure Value: 800PSIBurst Pressure Value: 4000PSILow Pressure Valve Display Value: -1-35bar (-30-500psi)Display Value Of High Pressure Valve: -1-55bar (-30-800psi)How to Use:Before connecting to the system, please check whether the pointer of the pressure gauge is at the zero position. Otherwise, open the cover and adjust the zero adjustment screw to set the pointer to the zero position.Connect with the system:1. First close the low pressure valve (blue) and high pressure valve (red);2. After connecting the low pressure interface to the blue tube (low pressure quick connector), connect it to the system low pressure and lock it;3. The high-pressure interface is connected with the red tube (high-pressure quick connector) and then connected to the system high-pressure and locked;