Specification:_x000D_ Deep groove sealed miniature ball bearing_x000D_ Type: 608-2RS_x000D_ Color: As the picture shows_x000D_ Size: Approx.8x22x7mm_x000D_ Materal:B earing steel_x000D_ Inner Diameter: 8mm_x000D_ Outer Diameter: 22mm_x000D_ Thickness: 7mm_x000D_ _x000D_ Note:_x000D_ Please allow a little size error due to manual measurement._x000D_ _x000D_ Package Included:_x000D_ 1 X 10pcs ball bearings 1These micro bearings are suitable for various machines and equipment, easy to install and good to use. 2These mini bearings are made of high quality bearing steel for low noise and long service life. 3Miniature bearings are resistant to high temperatures during operation, will not deform and confirm long?term use. 4Bearings reduce friction by providing smooth metal balls or rollers and a smooth inner and outer surface for the balls to roll against. 5Simple structure with stable performance, easy to use.