Siemens 3SU1801-0BA00-4AB1

Enclosure for command devices 22 mm, round, enclosure material plastic, enclosure top part gray, 1 control point, A = Selector switch, black, metal, 3 switch positions, momentary contact type, 1 NO, 1 NO, spring-type terminal, floor mounting, support terminal, recess for label, 1xM20 each on top and bottom