Feature: 1. Made of high‑quality 6061 aluminum alloy, it is sturdy and durable and has a long service life. 2. In addition, aluminum alloy production allows a certain amount of deformation to protect the derailleur from damage. 3. When a serious collision occurs, this tail hook can be broken and can be replaced with a new one separately 4. Easy to install and remove, and it can be replaced, reduce the maintenance cost of frame. 5. Well protect your bike from being damaged in case of falling down and fits to most types of bikes. Specification: Item Type: Derailleur Hanger Material: Aluminum Alloy 6061 Product Color: As Pictures Shown Aperture: Approx. 10mm / 0.4in Product Weight: Approx. 19g / 0.7oz Process: Aluminum alloy forging Product Description: Bike frame accessories to link bicycle frame and rear derailleur Package List: 1 x Derailleur Hanger Note: The derailleur hanger is an accessory of the frame (except for the hook rear derailleur). Please confirm whether it is the same as the tail hook used in your bike before purchasing.