... part,fasteners,hardware,spring,mechanical manufacture and so on Description STEEL ROD/STEEL BARMaterial JIS: SUP9,SUP9A,SUP10,SUP7,SUP12,SUP12V,SUP6,SUP7. SAE: SAE9254,SAE5160 ... ,50CrV,60Si2Mn,CK67,60Si2CrVA,60Si2CrMnA.Use Standard parts; Fasteners; Hardware, spring, mechanical manufacture and so on.Size Diameter:12mm to 300mm ...