Suitable for 22.2mm diameter bike handlebar.Easy to install. Please see Picture 3&4 for the Installation Notes. Please make sure it is installed well before use. If not properly installed, it will be dangerous when using horns during cycling and easily damage the grips.Aluminum alloy material, durable and not easy to rust.Horn handle, baked finish, convenient to climbing and bending over to accelerate.Ergonomic design, providing reasonable support and comfortable grip for both hands.Produktbeschreibung Features: The material of horn is aluminum alloy which is durable and not easy to rust. It's really easy to install and adjust. And you can freely adjust the angles for your riding preference. Its convenient to climbing and bending over to accelerate with the horn handle. It fits 22.2mm diameter bike handlebar.