Features:1. Double cover seal: There are detachable protective covers on both sides of the bearing, which can achieve the best lubrication effect and prevent the entry of dirt, ensuring the rotation speed and service life of the bearing.2. Ball bearing: Used for applications supporting radial and axial loads, featuring high load bearing, low noise, and high rotational speed.3. Durable material: Made of high carbon steel material, load-resistant, high-hardness, not easy to wear, sturdy and durable to ensure safe operation.4. Dimensional details: The bearing size is about 8x22x7 mm/0.31x0.87x0.28inch (inner diameter x outer diameter x width), and the package includes a total of 10 ball bearings.5. Wide range of applications: Suitable for medium-load products such as skateboards, inline skating and scooters, bicycles, motorcycles, and electric hand tools.Specification:Product Name: Ball BearingColor: SilverMaterial: High carbon steelSize: About 8*22*7 mm/0.31*0.87*0.28 inch (inner diameter*outer diameter*width)Type: A (608ZZ), B (608-2-RS)Cr (kN): 3300N (608ZZ/608-2-RS)Cor (kN): 1370N (608ZZ/608-2-RS)Grease lubrication limit speed (rpm): 34000rpm (608ZZ/608-2-RS)Oil lubrication limit speed (rpm): 40000rpm (608ZZ/608-2-RS)The package includes:10Pcs x Ball BearingNote:1. Due to the light and screen difference, the item& 039;s color may be slightly different from the pictures.2. Please allow 0.5-2 cm differences due to manual measurement.