Square Hollow Section Pipe 1.Size:specified demension 2.Surface:galvanized,paint... 3.Section ... sector, triangle, hexagon and octagon, etc Square Hollow Section Pipe/Steel Pipe/Tube 1-Finishing: galvanized,paint,annealed etc.2-Thickness: customized ... square shaped tube, irregalar shaped tube, etc.special shaped steel pipe/tubecustom profile steel hollow sectionspecial section steel pipes/tubes custom ...