Stainless Steel Ball SS440C, SS420, SS316L/316, SS304 Model Number2mm-50mmApplicationtoy, anit-rust purposeShapeshperialMaterialsteelDimensions2mm-50mmChemical CompositionsteelCertificationISO9001Stainless Steel BallFeatures:1) Materials: SS440C,SS 420, SS316,SS ... , hardware, bearings, wheel, caster, slider, bicycles and trust bearing pulleys Stainless Steel Balls