... or PU castors3.Finish:electro zinc plated4.Material:Steel square tube,round tube,steel wire,angle steel5.Weld:manual welding,welding manipulator (carbon ... dia. 2mm,3mmThickness of pipe 3mmThickness of base 3mmMaterialSteel bar,round tube,Square Steel TubeWheel dia.100mm,125mm,150mmWheels2 fixed 2 swivel ...