... Series S.S Steel Bar Grade: 302,304,321,316,309,310,314,etc. Size: 12mm~250mm Surface:Bright and oxidation 300 Series Stainless Steel ... Bar, Stainless WiresGrade: 302,304,321,316,309 ... preventing and anti-radiating property.Applications of Stainless steel wire: airspace, military, medicine, chemical ... .Regards! 300 Series Stainless Steel Bar