♥1 set: 6800zz 4 packs ♥PU double bearing nylon roller ♥The diameter of the roller is 30mm, and the length of the roller is 30m. Bearing hole 10mm ♥The chain roller pulley block is equipped with heavy-duty bearings that can be used at any time This sprocket roller slider is a must-have for the guide wheel, which helps the drive system to operate normally ♥The sprocket tensioner is made of high-quality materials with high strength and durability.It will perfectly match your vehicle chain.The chain roller guide is suitable for most off-road vehicles, street cars, motorcycles, ATVs, off-road vehicles, etc. High customer satisfaction: 1.The best service, return information ♥We guarantee that we will give you a satisfactory solution. ♥For any reason, if you are not satisfied with our products, you can return them within 15 working days after receiving the goods. ♥Returned goods must be in the factory state again: no defects and no damage.♥Who pays for shipping depends on the reason for return.