Features: Adjustable and flexible strap fits nearly all bicycle handlebars, the strap fits bars with diameters from 16mm – 38mm(0.6inch -1.5inch ). The bicycle bells always deliver a crisp ringtone to be heard clear, which make the riding much safer. The bicycle bell adopts quality copper and engineering plastic material which is anti-rust and anti-aging. Quick release design means easy and tool-free to install and remove. You install it without any install tools, that will be very convenient and save the time. Fits for any standard straight bicycle or stunt scooter handle bar, mountain bike bmx bike, kids bike, cruiser etc.