... several industries, such as hardware, sliders, ball bearing lead screw, wheels, toys, bicycles, bearings, ... etc.DETAIL SPECIFICATION: ItemAISI420 Stainless Steel BallCategoryStainless Steel BallMaterialAISI420Size2.0 mmGradeG500Hardness ( HRC)HRC58-65ApplicationBicycle, bearing, pulley, slide, handcraft, shelf ... placing order Italian Zinc Plated 25.4mm Steel ball made by professional manufacturer