Featuring anodic oxidation process, this dust cover can achieve good oxidation resistance and wear resistance. You can install it conveniently by yourself with no tools required. This dust cover is characterized by aluminum alloy structure, which enables it to achieve high strength, rust resistance and corrosion resistance to ensure long term use. It is constructed of aluminum alloy material. Featuring ultralight design, this dust cover can effectively reduce the burden of cycling. The inner diameter is 1.98cm. The outer diameter is 2.59cm. With exquisite pattern, it is beautiful and brings good visual effect. Suitable for most bicycles. Item Name: Crankset Dust Cover Material: Aluminum Alloy Features: Easy Installation, Lightweight, High Strength Size Details: Inner Diameter: 1.98cm/0.78"(Approx.) Outer Diameter: 2.59cm/1.02"(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 Crankset Dust Cover