R10-2RS Bearing - Hybrid Ceramic - Sealed 5/8" x 1-3/8 x 0.344"R10 2RS Hybrid Ceramic Bearing Sealed Ball Bearing 5 8" x 1 3 8" x 11 32" ZrO Ceramic Balls This hybrid ceramic R10 2RS bearing is built for electric motor performance with low rolling resistance and extended life. It features zirconia ceramic balls inside a chrome steel raceway, along with dual rubber seals to keep out dust and debris. Its a great fit for hobby motors, small machinery, and precision gear systems. This listing is for one bearing.