Feature 1Made of high quality bearing steel, durable with the resistance of wear and collision. 2Exquisite design, two sides metal sealed ball bearing, with good dustproof effect. 3Built-in precise micro bearing provides smooth running and long service life. 4Low speed, elegant performance and high stability. 5Standardization size, used for machine tool, electronic equipment, pump industry, plastic machine, motor and more.Specification Deep groove ball bearings are the most widely used type of rolling bearings, which is characterized by small frictional resistance and high rotational speed and can be used on mechanical parts that are subjected to radial loads or axial loads, such as machine tool, electronic equipment, pump industry, plastic machine, motor and more. Features: Made of high quality bearing steel, durable with the resistance of wear and collision. Exquisite design, two sides metal sealed ball bearing, with good dustproof effect. Built-in precise micro bearing provides smooth running and long service life. Low speed, elegant performance and high stability. Standardization size, used formachine tool, electronic equipment, pump industry, plastic machine, motor and more. Specifications: Model: 6901-2RS Material: bearing steel, rubber Quantity: 10pcs Bore diameter: 12mm / 0.47in Outer diameter: 24mm / 0.94in Thickness: 6mm / 0.24in Weight: Approx. 110g Package included: 10 x Rubber Sealed Deep Groove Ball Bearing Note: Please allow 1-3mm error due to the manual measurement. Thanks for your understanding.