17x17x1.2mm Square Hollow Section tube 1.Size:specified demension 2.Surface:galvanized,paint... 3.Section:square,rectangle, 17x17x1.2mm Square Hollow Section tube1.Size:specified ... , ellipse, semicircle, arch, sector, triangle, hexagon and octagon, etc Square Hollow Section Pipe/Steel Pipe/Tube 1-Finishing: galvanized,paint,annealed etc ...