... and patent products for E-bike,BICYCLES,MOTOCYCLES and so onSpecifications of item:1.Name of product:9LED flash knight ... *3.9cm,and diameter is 4.6cm5.Weight of product:38g,including package is 72g(one piece ... to install,it can be fixed on any parts of E-bike,bicycles,motocycles and so on with Nylon Cable ... see the following pictures: 9LED flash knight E-bike lights,bicycles lights,motocycles lights