Specifications: Material:Aluminum alloy +ABS Size:40*15MM Package Included: 1 * Bike bell Description: Suitable for handlebars 22.2mm, easy to install with a screwdriver. 1 minute to complete installation. Features: 1. Strong sound penetrating power: The bicycle bell makes a clear sound, 90 decibels can penetrate noisy traffic. Designed specifically for the safety warning of mountain bikes and road bikes. 2. Innovative invisible design: unique invisible Q shape, compact and light. This is a new design that subverts the tradition. Compared with the traditional bell, this new bell has more convenient operation and louder sound. 3. High-quality materials: made of high-strength aluminum alloy and ABS, strong and durable. Prevent rust and corrosion, and ensure a longer use time. 4. Suitable for most bicycles: Bicycle ringtones can perfectly fit most mountain bikes, road bikes, exercise bikes, children's mini bikes or vintage bikes. Note: Actual color may be slightly different from