Siemens 3SU1853-0AD00-2AB1

Enclosure for command devices, 22 mm, round, Enclosure material metal, enclosure top part gray, 3 control points metal, C=Pushbutton black,Label: II, 1 NO, screw terminal, B=pushbutton black,Label I, 1 NO, screw terminal, A=Pushbutton red, label: O, 1 NC, screw terminal, floor mounting, 1xM20 each on top and bottom, Labels enclosed