Fine workmanship and CNC precision machining make it not easy to deform and wear resistant, and has high hardness.Surface anodizing treatment makes it have scratch resistance, corrosion resistance and bright colors.Made of aluminum alloy material, the product is durable.There are many models for you to choose from.It is suitable for bike.Item Name: Rear Gear HangerMaterial: Aluminum AlloyAttributes: 1, 2, 4, 12, 21, 34, 36Features: Solid, CNC Precision Machining, Anti-oxidationSize Details: 1: 5.5cm x 4cm/2.17" x 1.58" (Approx.) 2: 5.7cm x 4.3cm/2.24" x 1.69" (Approx.) 4: 5.7cm x 3.5cm/2.24" x 1.38" (Approx.) 12: 5.1cm x 3cm/2.01" x 1.18" (Approx.) 21: 5.2cm x 2.8cm/2.05" x 1.10" (Approx.) 34: 6.2cm x 3.9cm/2.44" x 1.54" (Approx.) 36: 6cm x 4cm/2.36" x 1.58" (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