Features:High quality material, efficient and durable with competitive price.Reliable replacement electrical parts.Easy to install, directly replaces the old one.Specifications:Material: alloySize: 14mmWeight: 260gColor: silverPackage included :1x Rear Chain SprocketNotes:Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures.Please allow slight dimension difference due to different manual measurement.