Material : Spring steel.stainless steel size:available 8mm-100mm exported to lots of countries DIN2093,DISC SPRING WASHER,Disc Spring MaterialSizeFinishSpring steel8mm-250mmPlainSS (A2)8mm-250mmBlackSS (A4)8mm-250mmphosphating We carry out DIN 2093 and GB/T 1972-2005 standards and our enterprise standard.