Model size: CS-HG200-7 speed bicycle cassette. The weight is 0.25 kg. Cassette gears: 12-14-16-18-21-26-32T. .Material: High-strength alloy material, suitable for various harsh riding environments. Good corrosion resistance, heat resistance and long life. .Performance: The gear plate material is made of high-strength steel plate, which can get a smooth and easy shifting experience even under load. The flywheel wheel has a clear tooth number specification, which plays the role of a precise guide wheel, making the ride smoother. Application: The hollowing technology can easily reduce weight and make riding easier. Suitable for mountain bikes, touring bikes, and folding bikes. Also one of the choices for gift giving Note: 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.