The 1" center/side fitting from Canopies and Tarps is for high peak roof structures and is both economical and effective. Designed for a canopy roof that's peaked at 120 degrees, these steel fittings with welded connections provide a structurally-sound base holding everything in place. Each one of these galvanized steel fittings is designed with stability in mind. The welded connections ensure that no swaying or bending occurs, and each pole is secured using thick eyebolts. The inside diameter measures 1 ¼".