Features: Consist of durability aluminum alloys, it is light and durability. Suitable for enthusiastic cyclists and bicycles mechanic. It is suitable for various kind of cycling scenes, from leisures cycling to fierce mountain bike adventure. Essential bicycles component to enhances your cycling experiences. Ensures long-terms use and reliability operations for each cycling. Specifications: Color:Four Elections Dimension:72.7×26.5×14.2×10mm/28.62×10.43×5.59in Component:Aluminum Alloys Package Includes: 1pc Chain Tensioner 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.