... 1)Material:SUP7,9,9A,10,11,11A 2)Type:Conventional,Parabolic,Z-type,Galvanized 3)Certificate:ISO/TS1694 Boogie Leaf ... ,9,9A,10,11,11ATypeSemi-TrailerSize90x16-9 etc.Brand No.Conventional Leaf SpringFOB PriceUSD 800~1,000/TonDelivery TimeWithin 15 working ... Tons.The lead time is within 4 weeks Trailer Bogie Conventional Leaf Spring