Sup7 leaf springs for the truck Thickness:form 6mm to 50mm Width:from 44.5mm to 125mm Material:60Si2Mn , SUP7, SUP9, SUP11A Truck springsWe are a leading manufacturer of vehicle leaf spring and boat leaf spring. The features of our product are: thickness from 6 mm to 40 mm, and material 60Si2Mn,SUP6, SUP7, SUP9,SUP9A,SUP10, SUP11 and SUP11A are available.Our products contain:1) conventional leaf ...