BOWER sells 638. Related information about 638 includes: Model 638 Inner diameter: 8 mm Outer diameter: 28 mm Thickness: 9 mm Series: Deep groove ball bearing. If you want to know more about 638 related information, you can consult online or call the hotline , we will serve you in detail. 638 has a wide range of uses. 638 is mainly used in engineering machinery, machine tools, automobiles, metallurgy, mining, petroleum, machinery, electric power, railways and other industries. The price of 638 sold by our company is reasonable and we look forward to cooperating with you.