Square Hollow Section Pipe 1.Size:specified demension 2.Surface:galvanized,paint... 3.Section:square,rectangle,ellipse Square Hollow Section Pipe1.Size:specified demension 2.Surface:galvanized,paint,annealed etc ... , ellipse, semicircle, arch, sector, triangle, hexagon and octagon, etc Square Hollow Section Pipe/Steel Pipe/Tube 1-Finishing: galvanized,paint,annealed etc.2-Thickness: customized ...