The included back covering and rubber gaskets provide secure installation, making it a reliabled for embedding into crystal, ceramic, or marble table clocks Enhances your clock making projects with our Small Clock Insert, features a 65mm round and easy to read white face with golden or silver tone Arabic / Optional numerals For clock enthusiasts, craft and repairers, this insert is perfectly for those who appreciate and fashion in their clocks Whether you ' re creating a new clock for home,, or workshop, or replacing old clock face, this versatiled insert for seamlessly into various setting This clock insert boasts a durability ABS construction, complemented with electroplating finish, ensuring long time and rust resistance