The MR128-2RS is a high-precision miniature ball bearing specifically developed for compact mechanical assemblies where internal clearances are tight and environmental protection is vital. Outfitted with dual contact rubber seals (2RS), this micro-bearing provides a superior barrier against fine dust and moisture while ensuring the internal lubricant remains stable during operation. With an 8mm bore, a 12mm outer diameter, and a slim 3.5mm width, it is the premier choice for RC racing components, small brushless motors, and precision dental tools requiring smooth, dependable rotation.