Solid cast brass, with raised lettering and recessed Black Enamel background.Button light works with a 12 volt transformer only. Please check for compatible voltage. See more items from our Doorbells category. Specifications Item # 8681 Finish Shown Lacquered Polished Brass Diameter 2.75" Center To Center 2" Price As Shown Base Total $48.00 Grand Total $48.00