Our factory produces high-quality ABEC-3 Bicycle Bearing Rubber Cover 6811 Zz Ball Bearings. These bearings are perfect for cyclists who demand the best performance from their bikes. The ABEC-3 rating ensures that these bearings are extremely precise and will provide a smooth, efficient ride. The rubber cover also helps to protect the bearings from dirt and debris, ensuring a longer lifespan. As a manufacturer, we are committed to providing customers with the best possible product at a reasonable price. If you're in need of top-quality bicycle bearings, look no further than our factory.