Hign-concerned Chemical:NONELength:12cmis_customized:YesMaterial:Aluminum alloyUse:Cruisers,Mountain Bikes,Road BicyclesType:Brake LeverClamp Diameter:28.1 - 29.5mmWidth:300 - 400mmOrigin:Mainland ChinaMaterial of bicycle handlebar extenders:Aluminum AlloyFeatures: Brand New & High quality. Pattern: Solid package :1pc material: Metal Color: as picture shown Size: Length 12cm, circle diameter 3.5cm, the error is 0.5cm Conversion:1inch=2.54cm, 1cm=0.394inches Warm Tip : 1.Please be reminded that due lighting effects, monitor's brightness/contrast settings etc, there could be some slight differences in the colour tone of the website's photo and the actual item. 2.Item Measure by hand, it could be 1-2cm different,your kind understanding will be much appreciated. Conversion:1inch=2.54cm, 1cm=0.394inches