Collectable Sign and Clock's Chevrolet Parts with numbers Lighted Clock measures 14 inches across. The outer lens is made from high quality optical Lexan held in place with 3 removable rivets. It is scratch resistant and won't yellow over time. The advertisement face is cut out by a CNC router and the image is placed with a UV dried computer controlled printing process that will last for many years. The back of the clock is made from black ABS plastic that houses a 22 Watt fluorescent circline replaceable bulb with an on/off switch in the cord. The clock is a battery operated quartz movement that runs from 1 double AA battery. This would look great in your home, office, or garage.