... 6.2mm1.8m) plastic tubes, 1 L-bracket, 3srews, 2 pressure-adapted tubes. Caution:+ The Pressure Switch should be mounted vertically which ... (Screw terminal):If the actual pressure is below dial setting, 1-2closed, while if the actual pressure is over dial setting ... the type /model number of the control .this number can be found on the side of the control. Differential pressure control switch SA-50KZY