The material of stacking manual trucks of 0.5 ton, 1 ton and 1.5 ton are all made of channel steel columns; the 2 ton and 3 ton are all made of I-beam columns.Purely manual welding. Masters with many years of industry experience personally weld each hydraulic forklift. Each hydraulic forklift has been shot blasted to effectively enhance paint adhesion and extend service life. The oil pump seal ring uses imported parts, making the oil pump more labor-saving and durable.The gantry is made of steel plates welded to enhance lifting capacity.