Legend holder 30 x 50 mm with legend 18 x 27 mm unmarked for square head

This Harmony ZB, legend holder with label on bottom has 1 white side and 1 yellow side background. This legend holder allows you to customize the control unit with blank legend for custom engraving to support any desired marking. It is compatible with any standard 22mm Harmony control or signalling unit with square head. It has clear and resilient symbol marking on the label, with high contrast.