About this item What you receive: the package includes 4 pieces of bike bells in different colors, consisting of black, white, red, and blue. Classic colors and sufficient quantity are suitable for your whole family. Appropriate size: the bike bell has a classic outlook and comes in a compact size measuring approximately 2.2 x 3 cm (0.87 x 1.18 inches). It easily fits bicycle handlebar tubes, with an outer diameter of approximately 2122 mm (0.830.86 inches). Sturdy material: made of quality plastic and aluminum alloy, the bike bell is rust-resistant and aging-resistant. Featuring a classic design, high-strength springs, and a durable alloy bracket, this bicycle bell is easy to install. Simply tighten the screw on the handlebar using a screwdriver, requiring minimal time to complete. Classic design and loud sound: the bell features a classic design that is simple yet stylish, adding a charming look to your bike. It produces a loud, clear sound, enhancing riding safety. Suitable for both adults and children. Compatible with most bicycles: these bicycle accessories are suitable for children's bikes, mountain bikes, road bikes, urban bikes, small motorcycles, MTB, and more.