This Harmony ZBY sheet of peel-off, self adhesive legends has 66 circular unmarked legends. It is compatible with Harmony XB4 and XB5 push buttons and pilot lights. This sheet of legends provides 66 self-adhesive circular blank legends for custom engraving to support any desired machine operation. It is compatible with any standard 22mm Harmony control or signalling unit. It provides clear and resilient symbol marking on the label, with high contrast.