Factory Directly Ome Polish Hole Carbon Steel Ball Making 6.9mm 7.937mm Steel Ball with Hole Shandong Jinnai International Trade Co., Ltd. Base Info Description Pre：5.556mm 7.07mm 7.937mm Low Carbon Steel Ball Stainless Bulk Steel Balls for Belt and Roller Conveyors Next：10.0mm Soft Carbon Steel Ball AISI1010-AISI1015/Suitable for Motorcycle, Bicycle, Auto Parts, Medical Equipment, Cosmetics
