Solid Brass Avalon Style Door Bell (Brushed Nickel Finish). This door bell measures 2 5/8 inches by 1 1/2 inches. Direct screw mount and connects on normal door bell voltage with two common wires. Uses 24 Volt maximum (standard doorbell circuits). Includes all necessary mounting hardware. Available in several designer finishes including polished brass, antique brass, oil rubbed bronze, polished chrome, polished nickel, and brushed nickel.