Incredibell Gearbell Bell Ring My Bell The Gearbell has a clear dome that lets you watch its colorful gears work every time you ring it. It's rainproof, so it keeps ringing through wet rides. It's a fun bell for commuters, kids' bikes, and anyone who likes a little color on the handlebar. Features Transparent dome, shows the colorful gear workings inside Rainproof construction, keeps ringing in wet weather48mm dome, a large bell for a clear ring SPECIFICATIONSIntended Use Commuting, Casual Riding, Kids' Bikes Dome Diameter48mm (1. 9")Handlebar Compatibility21mm - 22. 5mm | Incredibell | Gearbell Bell Black/multi-Color