Description: Dimensions: The front diameter of the clock insert is 3.54inch(90mm), the back diameter is 3.07inch(78mm), and the inlay depth is 0.59inch(15mm). Features: The clock inserts are made of gold , PVC clock face, metal hands and black Arabic numerals on the white dial, which are easy to read. Equipped with a rubber , directly inlaid and fixed in the clock seat, you can make your own DIY clock or use it to repair or replace a broken clock, easily read the time and prevent dust from entering the dial. Classic style: suitable for classrooms, offices, living rooms, guest rooms, meeting rooms, restaurants or any other places. Power supply: 1 AA battery is required (not included). Specification: Material: Metal, Pp Battery: 1 AA battery (Not Included) Size Chart: Front diameter: 90mm/3.54inch Back diameter: 78mm/3.07inch Installation depth: 15mm/0.59inch Package Includes: 1 Piece 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!