Description:Fine workmanship and CNC precision machining make it not easy to deform and wear resistant, and has high hardness.It has scratch resistance, corrosion resistance and bright colors features because of its surface anodizing treatment.Made of aluminum alloy material, the product is durable.The length of the product is 6.3cm, the width is 2.3cm, and the thickness is 1.5cm.It is suitable for upgraded 34-52T flywheel of mountain bikes and road bikes.Item Name: Tail Hook ExtenderMaterial: Aluminum AlloyColors: Black, Red Features: Solid, CNC Precision Machining, Anti-oxidationSize Details: Size: 6.3cm x 2.3cm x 1.5cm/2.48" x 0.91" x 0.59" (Approx.)Notes: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.Package Includes:1 x Rear Gear Hanger