1. 【Standard size】 The bearing size is exact, inner bore is 8mm, outer diameter is 22mm, width is 7mm. 2. 【Commonly Used Type】 608ZZ single row deep groove ball bearing is family commonly used models, good for most occasions. Carbon steel ball bearings, durability and resistance to deformation under heavy loads. 1500 rpm limit with grease lubrication. 3. 【High quality material】 Deep groove ball bearing is made of carbon steel, and the sealing material is iron cover, with bright metal luster, longer life and higher precision. 4. 【Fine workmanship】 Smooth edges, no burrs, low noise, high limit speed, and not easy to get too hot, high bearing capacity, suitable for high demands.Inliner ball bearings, low noise. High speed. High temperature resistance. Resistance to high loads. 5. 【Wide application】 Our bearings are widely used in engines, agricultural machinery, metallurgy, automobiles and windmills; Also often used in daily life, such as skateboards, children's car toys, roller skates.