... 1.We are one of the leading manufacturer in steel ball industry in China. We are THE PRESIDENT OF STEEL ... material AISI304, 316, 420C, 440C2. Steel ball, with material AISI 1008-1086.3. Chrome steel ball,with material: AISI521004. Flying saucer steel ball5 ... are widely used in several industries, such as hardware, sliders, ball bearing lead screw, wheels, toys, bicycles, bearings, trust bearings ...