... , semicircle, arch, sector, triangle, hexagon and octagon, etc Square Hollow Section Pipe/Steel Pipe/Tube 1-Finishing: galvanized,paint,annealed etc.2-Thickness ... shaped tube, irregalar shaped tube, etc.special shaped steel pipe/tubecustom profile steel hollow sectionspecial section steel pipes/tubescustom design & demensionspecial design & demensions can be ...