Welcome to our store！</br> 1、Light weight, small size, easy to carry and store, more convenient and practical. 2、Made of high‑quality aluminum alloy and ceramic materials, rust‑proof, corrosion‑resistant and durable. 3、There is no strange sound, fast, smooth, no noise, supports various speed changes, and is more practical to use. 4、16T bicycle aluminum alloy rear guide pulley can be installed with 4/5/6mm size axle. 5、Strict quality control and quality assurance, high safety factor, can be used with peace of mind. <p class="wang-edit-text"><p class="wang-edit-text"> Item Type: Bicycle Aluminum Alloy Guide Wheel Weight: Approx.16g/0.6oz Material: Al7075 Aluminum Alloy/Ceramic Bearing Installation Size: 4/5/6mm Axle <style> .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }</style> 1 x Rear Derailleur 2 x Sleeve Tubes Satisfaction - Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactoryaftersalesservice</br>