BOWER sells BK4020. Related information about BK4020 includes: Model BK4020 Inner diameter: 40 mm Outer diameter: 47 mm Thickness: 20 mm Series: Needle bearing. If you want to know more about BK4020 related information, you can consult online or call the hotline , we will serve you in detail. BK4020 has a wide range of uses. BK4020 is mainly used in engineering machinery, machine tools, automobiles, metallurgy, mining, petroleum, machinery, electric power, railways and other industries. The price of BK4020 sold by our company is reasonable and we look forward to cooperating with you.