Coolrunner Classic Clown Bugle Horn Metal Bike Horn Bicycle Bell for Vehicles Golf Cart MATERIAL: Polished stainless steel is non-fading, durable and weather resistant, does not readily corrode, or rust and the rubber ball is soft for using, prevents scratching. EASY TO INSTALL: Just use a hex key/screwdriver(not included) to tighten the screws, easy to install and remove from the handle bar of a bike. HORN SIZE: Length-18cm(7.0"); Horn ball diameter - 5.5cm(2.2"); Metal mouth - 7.3cm(2.9"). Mounting dimensions: Handlebar diameter - 2.22 cm(0.87"). SAFE AND LOUDLY: Clear the way with a distinctive honk by squeezing the rubber ball on the horn, the unmistakable sound lets everyone know you're coming. This classic retro bicycle bell is universal for any vehicles as Golf Carts, Boats, RV's, Bicycles, Motorcycles, etc. Customize your bike the way you want for making a great attraction on your bike.(For ages 6 and above)