Description 1Made of high-quality 6061 aluminum alloy, it is sturdy and durable and has a long service life. 2In addition, the manufacturing of aluminum alloy allows for some deformation to protect the derailleur from damage. 3When a severe collision occurs, this derailleur hanger can break and can be replaced with a new one separately. 4Easy to install and remove, and it can be replaced, which reduces the maintenance cost of the frame. 5Protects your bike well from being damaged in a fall and fits most types of bikes. Item Type: Derailleur Hanger Material: 6061 Aluminum Alloy Product Color: As Pictures Shown Aperture: Approx. 10 mm / 0.4 in Product Weight: Approx. 19g / 0.7oz Process: Aluminum alloy forging Product Bicycle accessories for linking bicycle frame and rear derailleur 1 x Derailleur Hanger The derailleur hanger is an accessory to the frame (except for the hook-shaped rear derailleur). Please confirm if it is the same as the derailleur hanger used on your bike before purchasing.