Dimensions: overall diameter of this clock insert is 3-1/2 inch/ 90 mm Fit round hold diameter/ mounting diameter is 3.0 inch/ 78 mm Mounting depth is 0.6 inch/ 15 mm Clear cover with border: the plastic rim with quartz movement is good for DIY crafts or replacing old clock faces And the clear cover allows for easily reading the time Rubber band gasket: rubber band gasket of this craft clock insert securely hold the insert in place and allow for slight irregularity in the hole Wide application: plastic rim with quartz movement fits for crafts or replacing old clock faces, round clock insert can be applied to many places Power: this round desk clock insert only requires 1 piece AA battery (not included) Warm note: clock insert is intended for indoor use only, not weather resistant When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please dont hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it