Feature:_x000D_ _x000D_ This sealed ball bearing has deep groove geometry for high speeds and supporting both radial and axial loads. _x000D_ 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. _x000D_ 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. _x000D_ Rolling bearings use rolling elements to maintain the separation between moving parts to reduce rotational friction and support radial and axial loads. _x000D_ Exquisite mechanical design makes little noise when rotating. _x000D_ _x000D_ Specification:_x000D_ Model: R166ZZ common_x000D_ Inner diameter: 4.762mm_x000D_ Outer diameter: 9.525mm_x000D_ Thickness: 3.175mm_x000D_ Bearing material: Bearing steel_x000D_ Use characteristics: High speed_x000D_ Rolling body series: Single row_x000D_ Raceway type: Deep groove_x000D_ _x000D_ Rolling body: Ball _x000D_ Sealing cap: Double-sided seal _x000D_ _x000D_ Package list:_x000D_ 10 * Ball Bearings_x000D_ _x000D_ Note:_x000D_ The actual product color may deviate from the photo due to light._x000D_ There may be a slight deviation in the measurement of product.