Dump Semi-trailer / Dump Tipper Semitrailer / Tipper Trailer ============================== Tel:86 139 6981 0865 Fax:86 532 8693 5899 Email: william.cimc@gmail.com ============================== Tri Axles / Double Axles dump tipper semi-trailer Suspension type ,tires,alxes are optional Bogie suspension,Genmanic type suspenion,American type suspension Side walls height would be designed by your requests.