Bike Ring Alarm Cycle Bell Brass Bicycle Bell Material: Made of high-strength aluminum alloy and ABS material, it is durable, rust-proof, corrosion-resistant, and has a long lifespan. Suitable for handlebar diameters: 22.2mm-22.4mm / 0.8in-0.9in. Easy to install with a screwdriver. The bicycle handlebar bell provides a clear and loud sound of 90-100 decibels. It is enough to attract people's attention on the road and protect you and others from danger. [Compatibility]: Suitable for most handlebars, 2.2cm-3.18CM. Strong sound penetration: The hidden "O" type design is inconspicuous, but the sound is very clear. The maximum volume ringtone is up to 90 dB. Red bell made of aluminum alloy, with a design that is corrosion-resistant and fire-resistant. - Color: Red - Material: Aluminum alloy - Features: Fire-resistant, corrosion-resistant Thank you for viewing.