This is a bike wall clock made out of recycled bicycle sprockets. Black clock hands make the clock look very bold & eye-catching. The clock measures 6.5'' (around 16cm) in diameter. Made with a brand new, silent quartz clock mechanism. Runs on 1AA battery. We can offer a custom engraving of your choice on a small, brushed metal plate affixed to the back of the clock. 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 our other items: clocklight.etsy.com All my recycled clocks are made from previously used parts & although thoroughly cleaned they might show some signs of previous usage. Thank you for looking, & if you have additional questions don't hesitate to ask, I'm here to help. Bicycle Sprocket Clock, Bike Wall Gift, Cyclist Unique Boyfriend Husband Birthday Dad Clock