The R4 2RS KSM Miniature Radial Ball Bearing is designed for high-performance applications requiring compact dimensions. This bearing features a double rubber seal for enhanced protection against contaminants, ensuring longevity and reliability. With an inner diameter of 4mm and an outer diameter of 9mm, it is ideal for small machinery and precision instruments. The bearing is constructed from high-quality steel, providing excellent load capacity and durability. It meets industry standards for performance and is suitable for various applications, including robotics and automotive components.