Size: 6200-2RS (inner diameter=10mm, outer diameter=30mm, thickness=9mm) Seal on both sides of the bearing to maintain lubricant. Suitable for complex environments Made of steel, durable and able to withstand heavy loads, both sides are sealed to help save oil and effectively protect oil from impurities; Smooth rotation, low vibration, durable and long-lasting Low noise, high speed, high temperature resistance, and high load resistance Made of high-quality chrome plated steel, double sealed, manufacturer pre lubricated/lubricated, low friction coefficient, and stable performance. Stable operation: low friction, fast speed, low noise, reduced equipment pressure, good load, providing smooth and efficient sports for various applications - bicycles, motorcycles, skateboards, long boards, inline skating, electric skateboards, toys, lawn mowers, ice skates. The application range is wide: compact in size, suitable for various lighting equipment and instruments that require precision operation, such as motors, pumps, fans, instruments, etc. With optimized internal design, low friction and noise can be achieved even after long-term use.