air suspension beam spring Dimension:100*40mm. Material:50CrVA No of leaf: 2 leave air suspension beam spring 1.Nameair suspension beam spring 2.standardDIN, ASTM,JIS,BS,AS,ISO,GB,Nonstandard bolt(according to your order),etc3.MaterialSpring Flat Bar, 60Si2Mn, SUP9, 50CrVA, SUP74.GradeGood quality5.FinishZinc plated,Black,etc6.Size Width:>=45mm, Thickness:>=5mm7.Supply abiltity2000 tons per month ...