Features: Consist of good-quality component, good wear resistance and corrosion resistance, ensuring long-terms use. Effectively reducing the gaps between the crankshaft and the central axles, improving stability and safety during cycling. Concise, users can easily complete the installation without the need for complex tool. Reduce additional weight without affecting the overall performances of the vehicle. Good sealing performances effectively prevents dirt and moisture from entering the central axises, extending the lifespans of the component. Specifications: Color:Three Elections Dimension:24mm/0.94in 29mm/1.14in 30mm/1.18in Component:Aluminum alloys+stainless steel Package Includes: 6pcs Bicycles Crankset Spacer note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.