CRISP RINGTONE TO BE HEARD CLEARLY : The aluminum bicycle bells with fashion outlook always deliver a crisp ringtone to be heard clear, which make the riding much safer. The aluminum bike ring is one of essential bike accessories for kids and adults for mountain bike or road bike riding.LOUD WARNING BELL: The aluminum bicycle ring bell is special designed for mountain bikes and road bikes as a safety warning bell. The bike bells will fit most mountain bikes and road bikes very well and put out a crisp bike ringtone to be heard clearly.EXCELLENT MATERIAL FOR DURABLE USE : The bicycle bell adopts quality aluminum and engineering plastic material which is anti-rust and anti-aging that give men and women riders a prolong usage. The bike ring always stay new and useful after a long time use.EASY TO INSTALL: Fits for bicycles handlebar tube outer diameter with 21mm - 22mm (0.83inch - 0.86inch).1 MINUTE to complete installation. Just tighten the screw on the handle bar with a screwdriver.FOR BIKE TYPE: Fits for any standard straight bicycle or stunt scooter handle bar, mtb bike bmx bike, kids bike, cruiser etc.