Description: 【Premium Material】: The bike rear derailleur hanger is made of high quality aluminum alloy, wear resistant, sturdy, durable, and longer use. 【Easy to Install】: Mounting bolt included with a derailleur hanger, easy to install, replace, and remove. 【Practical and Smooth Surface】: The rear gear mech has a good texture, and smooth appearance, which will be providing a better user experience. 【Effective Protection】: Rear gear derailleur hanger hook can well protect your bike from being damaged in case of falling down, protecting fully protect your bike. 【Application】: Derailleur hanger fits most types of bikes, mountain bikes, and road bikes. Specification: Material: Aluminum Alloy Size 6.3cmx2.3cmx1.2cm/2.48inchx0.91inchx0.47inch Increased by 41mm, can increase the tooth capacity of 20 to 22 tooth, often used in rear flywheel large tooth changed to 36T 40T 42T 44T 46T 50T 52T 56T Package Includes: 1 Bike Rear Derailleur Hanger 1 Bolt(4 Pack) Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!