2 1/2 Inch Solid Brass Art Deco Doorbell Button2 1 2 Inch Solid Brass Doorbell Button Measures 2 1 2 Inches by 1 1 2 Inches Uses 24 Volt Maximum (Standard Doorbell Circuits) Center to Center Mounting Distance is 1 3 4 Inch Button Is Made From Color Matching Resin Material This doorbell button mounts with two brass screws (included) and it has two lead contacts on the back. Measures 2 1 2 inches by 1 1 2 inches. Uses 24 volt maximum (standard doorbell circuits). The center to center mounting