Feature: It is made of steel material which makes it durable and resistant to deformity under heavy loads. This bearing is brand new and pre-lubricated/greased from the manufacturer so no additional lubrication is required. This deep-groove sealed ball bearing is for use in applications that involve combined radial and axial loads and a need for high running accuracy at high rotational speeds. Rolling bearings use rolling elements to maintain the separation between moving parts to reduce rotational friction and support radial and axial loads. Exquisite mechanical design makes little noise when rotating. Fine workmanship, smooth surface, excellent mechanical properties. Specification: Model: LFR5201-12 common Inner diameter: 12mm Outer diameter: 35mm Thickness: 15.9mm Bearing material: Bearing steel Use characteristics: High speed Rolling body: Double row Raceway type: Deep groove Raceway type: Spherical Sealing cap: Double-sided seal Package list: 1 * Ball Bearings Note: The actual product color may deviate from the photo due to light. There may be a slight deviation in the measurement of product. 1、It is made of steel material which makes it durable and resistant to deformity under heavy loads. This bearing is brand new and pre-lubricated/greased from the manufacturer so no additional lubrication is required. 2、This deep-groove sealed ball bearing is for use in applications that involve combined radial and axial loads and a need for high running accuracy at high rotational speeds. 3、Rolling bearings use rolling elements to maintain the separation between moving parts to reduce rotational friction and support radial and axial loads. 4、Exquisite mechanical design makes little noise when rotating. 5、Fine workmanship, smooth surface, excellent mechanical properties