truck part,leaf spring leaf spring for heavy duty truck, standard leaf spring: Howo system,Styer system, 6X4,6X2,4X2,8X2 and more.our leaf spring use for heavy duty truck, trailer,semi-trailer.Use the raw metal usually: SUP7, SUP9, SUP9Awe welcome you visite our alibaba website, if you interesting any one, call and email us.we also welcome you supply us your special draw, it's accept.for our ...