1、These miniature bearings are made of high quality bearing steel for low noise and long service life 2、Bearings have a 8mm inner diameter, a 22mm outer diameter and a 7mm thickness 3、These are great for 8mm shaft/rod projects such as mechanical equipment, electrical instruments, toys, doors and windows 4、There comes total 10 pieces miniature bearings which you may use for many different projects 5、608 bearings are used in a wide variety of applications including skates and skateboards, electric motors, home appliances, and much more. Description: Miniature ball bearings are available ball bearings of small size. These miniature ball bearings have a 8mm inner diameter, a 22mm outer diameter and a 7mm thickness. Ball bearings of this size are ideal for precision work and applications that require a lot of functional mechanical parts, such as mechanical equipment, electrical instruments, toys, doors and windows. Features: These miniature bearings are made of high quality bearing steel for low noise and long service life. Bearings have a 8mm inner diameter, a 22mm outer diameter and a 7mm thickness. These are great for 8mm shaft/rod projects such as mechanical equipment, electrical instruments, toys, doors and windows. There comes total 10 pieces miniature bearings which you may use for many different projects. 608 bearings are used in a wide variety of applications including skates and skateboards, electric motors, home appliances, and much more. Specifications: Material: Bearing steel Inner Diameter: 8mm / 0.31" Outer Diameter: 22mm / 0.86" Thickness: 7mm / 0.27" Quantity: 10pcs Package Includes: 10 x Bearings