... 15-30days 5. Nice after-sale service SpecificationDimension:0.3mm to 60mmMaterialChromium, Mn, Mo, 9Cr18,3Cr13, stainless steel, SUS201/304 ... /316,Copper, aluminum, Titanium alloy steel, agate, glass, ceramic, Carbon steel, Chrome steel etc.Surface TreatmentZn ... website: http://gdsx.en.alibaba.com metal steel ball,stainless steel balls,10mm stainless steel ball