DescriptionWaterproof, dustproof, super light, best quality and visual effect, unique rubber design. Can fit most of the bikes well, application for integrated hollow crankset(crankset side). Made by Aluminum material, long service life and durable. Special surface treatment process make our product fadeproof and easy to install.Feature- Color: Black. - Material: Aluminium Alloy. - Size: 2.58 x 1.70 x 2.58cm. - Compliant with: minimum 17MM, maximum 21.7MM handlebar. - Dustproof,Super light,Cool logo,Best quality and Visual effect,Unique rubber band design. - Application: integrated hollow crankset(crankset side). - Diameter fits most integrated hollow crankset. - For mountain bike and road bike. - Special no-ring waterproof design, never ageing, more longer service life than similar product.