Feature 1These miniature bearings are made of high quality bearing steel for low noise and long service life 2They are shielded to avoid contaminants entering and save lubricant 3Bearings have a 8mm inner diameter, a 22mm outer diameter, a 7mm thickness and a 25mm flange 4These are great for 8mm shaft/rod projects such as mechanical equipment, electrical instruments, toys, doors and windows 5There comes total 10 pieces miniature bearings which you may use for many different projectsSpecification Description: Miniature flanged ball bearings areavailableball bearings of small size. These miniature ball bearingshave a 8mm inner diameter, a 22mm outer diameter, a 7mm thickness anda 25mm flange.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. They are shielded to avoid contaminants entering and save lubricant. Bearings have a 8mm inner diameter, a 22mm outer diameter, a 7mm thickness anda 25mm flange. 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. Specifications: Material: Bearing steel Inner Diameter: 8mm / 0.31" Outer Diameter: 22mm / 0.86" Thickness: 7mm / 0.27" Flange Diameter: 25mm / 0.98" Quantity: 10pcs Package Includes: 10 x Bearings