... of Origin: Jiangsu, China (Mainland)Material: chrome steel, carbon steelcage: Steel ,nylon ,brass ,bronzeroller: Carbon ,bearing steel,chromium steel, ... .2 kgInner Diameter :87-280mmOuter Diameter :100-320mmMaterial:bearing steel; chrome steel;stainless steelCage:Steel ,nylon ,brass ... Convenient Transportation Certificates Applications Users'Manul 1.The bearing should be stored in the enviroment of dry ...