(By:-ByronBells) 1 5/8 in x 4 3/8 in Shown in Brushed Nickel Power transformer Bell Pushes are solid brass and can be used with existing door bell systems Lighted Bell Pushes cannot accept more than 12 volts from a transformer nor can they be used with a battery powered bell - Buy Now or get More Info on Byron Bells Hardware - Click Here To Order