This is great! I use them regularly to ship 11x17 prints. Not only are they cheaper than shipping a flat print, they protect the print better from damage. Difficult to find short, large diameter pipes; I'd be more comfortable with a 5" diameter to be honest, but I haven't heard any customer complaints of buckling or folding when rolling. Since most people mount and frame their prints anyway, a slight curvature of the print when unfolded is not a problem.