Air suspension leaf spring 1)Material:SUP7,9,9A,10,11,11A 2)Type:Conventional,Parabolic,Z-type,Galvanized 3)Certificate:ISO Air suspension leaf springTinmy leaf spring factory is one of leading manufacturers in China who can make a full range of conventional leaf spring spring, parabolic leaf spring and Z-type leaf spring which are used in heavy duty trucks, semi-trailers, boat trailers, light ...