ElectricThe Schneider Electric ZB2BY4909 with Switch Hardware LEGEND PLATE is an electronic part used to provide the necessary hardware for a switch. It is composed of a frame and a legend plate to hold the switch in place. The frame is made of flame-retardant, self-extinguishing material, while the legend plate is made of aluminum to provide a corrosion-resistant surface. The materials used to create this part have also been tested to ensure that they meet the necessary requirements. This part is designed to fit most standard switches with a 5 mm thread and is UL certified. It is suitable for installation in commercial, industrial, and residential applications.