In merits of pocket-size and light weight, our product is easy to carry and install without any tools. There is no doubt that our product is made of aluminum material, so it is not easy to rust, wear-resistant and corrosion resistant, and has a long service life. In the percussive bell, the sound is clear and crisp. It is made from aluminum and plastic, is durable to use. The diameter of the product is 5.2 cm. Our product is applicable to various models, suitable to the standard 22 mm diameter handlebar. Folding bikes, mountain bikes, bicycles, etc. can be applied. Item Name: Bike Bell Material: Plastic,Aluminium Features: In-deformable, Mini, Anti-crack Size Details: Diameter: 52mm/2.05"(Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Bike Bell All Products From Us Have Undergone Strict Quality Checks. If There Is Any Quality Problem Or You Are Not Satisfied With The Product . We Will Give You The Best Solution.