ZBCY6H101 - Schneider Electric
Legend holder 30 x 50 mm with legend 18 x 27 mm unmarked for square head. Accessory  separate part type: Legend holder. Accessory  separate part designation: Legend holder with blank legend. Accessory  separate part destination:  22 mm control or signalling unit with square head. Legend holder size: 30 x 50 mm. Product mounting: Flush mounting.