BOWER sells BK4520. Related information about BK4520 includes: Model BK4520 Inner diameter: 45 mm Outer diameter: 52 mm Thickness: 20 mm Series: Needle bearing. If you want to know more about BK4520 related information, you can consult online or call the hotline , we will serve you in detail. BK4520 has a wide range of uses. BK4520 is mainly used in engineering machinery, machine tools, automobiles, metallurgy, mining, petroleum, machinery, electric power, railways and other industries. The price of BK4520 sold by our company is reasonable and we look forward to cooperating with you.