Bike frame rear derailleur hangers belong vulnerable parts, general riders ride will bring a combination of tools, spare tire of a case of emergency, but the vast majority would not have thought to bring this little part. Used on bikes where the derailleur is held in place by the wheel nuts. If you hit the right side of wrestling in riding, there is the opportunity to damage the ears, this case is very common, especially in long-distance riders, this accessory is best to become an essential piece. Features - Color: Silver. - Material: Aluminum alloy. - Size: 6.30 x 3.90 x 0.80cm/ 2.48 x 1.53 x 0.31 inch. - Workmanship, solid and firm, very durable. Great accessory for cycling enthusiasts. - The bike rear derailleur hanger is made of aluminum alloy material. It is durable, firm, sturdy and corrosion resistance. - Prevent the bike rear derailleur hanger from falling and being . - The bike rear tail hanger is best to become an essential piece. - The bike rear tail hanger has lightweight design, appearance, and easy to use. Package list: 2 x derailleur hangers