The PRF122214-2RS double sealed bearings by RB Tech are deep groove ball bearings made of steel. They have a bore diameter of 3/4", an outside diameter of 1-3/8", and a width of 7/16". These high-quality bearings are designed for industrial automation and motion control systems, providing reliable and durable performance. Made in China, they are sold individually and are ideal for various mechanical power transmission applications requiring smooth and efficient operation.