Fits 2.2 cm / 0.87 inch handlebars This bike bell is designed for handlebars with a diameter of 2.2 cm (0.87 inches). It is compatible with road bikes, mountain bikes, children's bikes, sports bikes, scooters, and more. Please measure your bicycle handlebars before . materials Constructed from quality aluminum alloy and ABS materials, the bell is waterproof, rustresistant, and durable. It is built to withstand riding in rain or snow, helping you ride with confidence. Unique design and sound mechanism The Cshaped design is stylish and can serve as a decorative touch for both adults and children. It uses a metal collision mechanism to produce a clear, loud ring. To ring, simply flick the lever. Loud and clear performance The bell can reach 8090 dB in typical use, delivering a loud, clear signal that stands out in busy or noisy environments, helping to alert pedestrians and improve safety. Use scenarios Urban commuting and school runs: Provides a reliable audible warning to pedestrians and other road users in busy streets and crossings. Family or group rides: A stylish, functional accessory for adults and children that adds visibility and a clear signal during shared rides. Wet or harsh weather conditions: Weatherresistant materials ensure dependable performance when riding in rain or snow.