Description: Dimensions: Overall Outside diameter is 100 mm/3.94 inches; Mounting depth is 50 mm/1.97 inches. (Excluding the height of the timing knob)Design: Roman skeleton clock insert features a clear view of its internal rotating gears. You need a 1x AAA battery (not included).Quality: Clock insert with metal frame, movement, black hands, and Roman numerals, smooth surface and bezel with workmanship, easy to read.DIY: Directly inlay and fixed on the clock base, you can DIY the clock yourself, or you can use it to repair or replace a broken clock, read the time easily, and prevent dust from entering the dial.Classic Style: Suitable for classroom, office, living room, guest room, meeting room, dining room, or any other place. Specification: Material: Copper, Stainless Steel, Plastic Size Chart: 10cmx10cmx5cm/3.94inchx3.94inchx1.97inch Package Includes: 1 Clock Insert Note: 1. Please allow slightly error due to manual measurement.2. Due to the difference between different monitors, the picture may not reflect the actual color of the item.?3. Wish you a wonderful on line shopping!