... steel flat bar 1.Specification(KGS/M):6-20x60-150mm 2.Materials:55Si2Mn 3.Lenght:6m Specificationsspring steel flat bar1 ... and special tapered leaf spring processing enterprisesHot-rolled Flat Steel for High-load Vehicle8x140mm,10x140mm,12x140mm,14x140mm,16x140mm,18x140mm, ... trailer manufacturers and used for trailer girders If you are interested in our products,Please contact us. spring steel flat bar