Features: Improve bicycles shifting performances, suitable for various vehicle models, easyly to install, and strong durability. Consist of good-strength Metal component and treated with black oxidation. Rusts resistant and wear-resistant, light weight. Suitable for mountain and road cycling enthusiasts, especially those who require frequent gear changes. Suitable for various cycling environment such as mountain, road cycling, long-distances travel. Specifications: Color:Four Elections Dimension:4.73×0.67×0.69cm or 1.82×0.26×0.27in Component:Metal Package Includes: 1pc Mountain Bike Derailleurs Hanger Extenders 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.