Manifold Main Unit, High Pressure Needle Washer, Gauge Mounting Screw: 1/8 NPT, Connection Port: 1/4 Flare, Sight Glass (TA120T-11) Pressure Gauge/Compound Meter, R22, R12, R502 Refrigerant with Saturation Temperature Scale, 0 Point Adjustment Function, Pressure Gauge (TA140): -0.1-3.4 MPa (TA141) ):-0.1 - 2.4 MPa Gauge Diameter: 68 φ