Features: Crafted from aluminum alloy, this chainring offer a blend of durability and light weight design. Ensures a flat, sharply surfaces for optimal chain retention and performances. Features an integrated guard plate to protect against chain drop and leg tangles while riding. Easy to install, bicycles sprocket are the perfect replacement for bicycles repairs, allowing you to none longer worry about chains falling off. The light mountain bike crank adopts a narrow and wide tooth designs, which increases the retention and wear life of the alloy chain and reduces friction and noise. Specifications: Component: Aluminum alloy Tooth: 34T/36T/38T Size: about 104X74mm/4.09x2.91inch Package Includes: 1pc bicycles Single Disc Plate note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.