●Material:Aluminum Alloy, Waterproof, work well on rainy days ●Suitable Compatible with motorcycles and motorcycles ATV sports dirt electric bicycles ,It can be used Compatible with headlight fog brake hazard lights and other available components. ●Inner diameter of the hole: 22mm ●can be use as horn Switch,Stop Start Kill Switch,Power Start Button Switch,Stop Flameout switch,start switch ●Momentary action button, can be use as horn, enginee power, start kill switches