Specification Decibel90 100dbMaterialAluminum AlloyColorBlackWeightAbout 24g Features 1 Made Of Aluminum Alloy Material Environmentally Friendly And Durable 2 Suitable For Most Kind Of Bikes 3 Cycle Horn Sound Alarm Provide Loud And Crisp Sound 4 Mini Bike Cycle Bell Easy To Install No Complicated Procedures Needed 5 Adjustment Bike Bell Road Bike Bell Parts Package Includes 1 x Bike BellNote Please Allow Slightly Errors Due To Manual Measurement And Different Monitors