Tube moments, as the name implies, it is a kind of square shape of the tube, a wide variety of material substance can form square tube, which the media to, what to use, use in any place, most of the square tube steel pipe for the majority, mostly for construction square tube, decorative square tube, square tube construction. square tube, square tube is a call, that is, the side looks such as steel. After treatment process is rolled strip made. Generally the strip after unpacking, smooth, curl, welded to form a tube, and then rolled into the square tube by tube and then cut into the desired length. Typically 50 per pack.