Features: *New and high quality *Made of high quality materials, very practical Quick installation and easy to use *Made of high-quality materials, anti-corrosion, wear-resistant, and non-deformation *Enhance appearance: Add fashion personality and make your car look cooler and more distinctive. *Easy to install: Easy to install, firm and not easy to fall off. Simplified installation with no modification, cutting or drilling required. *Fashionable and long service life. Please confirm the suitability of the model before purchasing. *It can effectively suppress the horizontal swing of the chain and make the speed change more accurate. bearings are used, which are smoother and more responsive. The spring-type design does not worry about the bearings rubbing against the edges and causing abnormal noise. Two reducers are given, which are more compatible. After installation, they can be converted to 4/5MM bearings and rotate flexibly. *Please check the number of teeth on the vehicle when purchasing. In principle, it should not be greater than the number of teeth on the vehicle guide wheel, otherwise it may not be used. Specification: Product name: Bicycle rear derailleur pulley Material: Aluminum alloy Color: Black, Red, Gold, Silver(as shown in the picture) Size: 41.6MM Weight: 16g Processing technology: CNC cutting/anodizing. Package Content: 1 guide wheel+ 2 reducers+ screws Notes: 1. Due to various factors such as monitor brightness and light brightness, the actual color of the item may be slightly different from the image displayed on the website. 2. Manual measurement data may have slight deviations. Features: Improved Cycling Experience with Smooth Bicycle Rear Derailleur Pulley Material: light weight, good strength and well temperature resistance, good impact resistance Appearance and performance: automatic cutting, smooth edge, fit most of the road bicycles, delicate texture. Compatibility: smooth surface and exquisite workmanship, fit most of the bicycles. Easy Installation: Brand new and high quality, easy to install.