Introducing our high-quality High Precision Bicycle Bearing Steel Cover Mr105 Micro Deep Groove Ball Bearings! As a distinguished factory, we take immense pride in crafting these exceptional bearings using top-grade bicycle bearing steel. Designed with precision and built to last, our bearings are engineered to ensure smooth rotations and reduced friction for enhanced performance. The steel cover adds an extra layer of protection, preventing dust and debris from causing any abrasion or damage. Trust in our factory's expertise and experience, as we guarantee you'll receive reliable, durable, and precisely manufactured bearings that meet the highest industry standards.