50mm G40 AISI 52100 Chrome Steel Ball for Slewing Ring Bearing LUOYANG ZHISHENG STEEL BALL LIMITED LIABLITY COMPANY Base Info Description Pre：60mm G60 AISI 52100 Chrome Steel Balls for Slewing Ring Bearing Next：40mm 1 5/8" G40 AISI 52100 Chrome Steel Ball for Slewing Ring Bearing/Roller Bearing/Wheel Excavators
