This is a manifold that can be used with both heating and cooling conditions, so the pressure value of the low pressure side pressure gauge has been set to high pressure, so that you can measure the operating pressure when heatering. Manifold main unit: High pressure needle gasket; Gauge mounting screw: 1/8 NPT; Connection port: 1/4 flare; Sight glass included (TA120T-11) Charging hose; Connection diameter: 1/4 flare; Regular pressure: 5.5 MPa pressure gauge/compound meter; R22, R12, R502 refrigerant with saturation temperature scale ◇0 degree adjustment function. Image is TA120. Use T-1 Charge Hose (TA136A): 36.2 inches (92 cm) Red, Blue, Yellow Pressure Gauge (TA140): -0.1 - 3.4 MPa Compound Meter (TA141A-1): -0.1 - 3.4 MPa Application: Cold and Cold Temperature Specifications: 68 φ Gauge, Sight Glass, 4 Layer Hose Construction with Case