... 1.size:1.6mm-160mm 2.material:steel,stainless steel 3.surface:zincplated,natural color 4.ISO ... 5.thickness:0.3mm-18mmSpecification: Product NameStainlss steel flat washerSize1.6mm,1.7mm,2.0mm,2 ... 2.6mm,3.0mm,3.5mm,4mm....MaterialCarbon steel,201,304,316stainless steelSurface treatment Copper,alunminum,white ... natural color,black,accordig to your requirementStardand DIN,ANSI,BS,GB,ISO,JISGrade A2-70,A4-80 ...