This is a small bicycle, industrial, desk clock made from recycled bicycle sprockets. Made with a brand new, non-ticking quartz clock mechanism. Runs on 1AA battery. It measures close to 5'' (12.5cm) in diameter. The desk version comes with a custom made aluminum desk stand. All my recycled clocks are made from previously used parts & although they thoroughly cleaned they might show some signs of previous usage. It will make a great gift for any bicycle lover or someone who already has everything. It also looks great & will make a great conversation starter in your home or work place. & of course, it tells time! :) Check out my other stuff: clocklight.etsy.com Thank you for looking, & if you have additional questions don't hesitate to ask, I'm here to help. Have a nice day! Bicycle Industrial Clock, Modern Metal Bike Steampunk Desk Clock Gift For Cyclist Or Mechanical Engineer