★These miniature bearings are made of high quality bearing steel for low noise and long service life ★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 and a 25mm flange ★These are great for 8mm shaft/rod projects such as mechanical equipment, electrical instruments, toys, doors ★There comes total 10 pieces miniature bearings which you may use for many different projects, Weight: 0.2645547144 Pounds, Manufacturer: Wandisy