Description: _x000D_ Miniature ball bearings are available ball bearings of quite small size. These miniature ball bearings have a 5mm inner diameter, a 11mm outer diameter, and a 5mm thickness. Ball bearings of this size are ideal for precision work and applications that require a lot of functional mechanical parts in a small space, such as 3D printer, quadcopter or model. _x000D_ _x000D_ _x000D_ Features: _x000D_ These miniature bearings are made of high quality bearing steel for low noise and long service life. _x000D_ They are double shielded to avoid contaminants entering and save lubricant. _x000D_ Bearings have a 5mm inner diameter, a 11mm outer diameter, and a 5mm thickness. _x000D_ These are great for small hobby 5mm shaft/rod projects such as 3D printer, quadcopter or ship model._x000D_ _x000D_ There comes total 10 pieces miniature bearings which you may use for many different projects. _x000D_ _x000D_ _x000D_ Specifications: _x000D_ Material: Bearing steel _x000D_ Inner Diameter: 5mm / 0.19"_x000D_ _x000D_ Outer Diameter: 11mm / 0.43" _x000D_ Thickness: 5mm / 0.19" _x000D_ Quantity: 10pcs _x000D_ _x000D_ _x000D_ Package Includes: _x000D_ 10 x Bearings