This 7/8 inch (22.2mm) diameter aluminum tube is designed to join sections of a mount system. For situations where you need the versatility of a bend in the system, this tube has either a 40 or 50 degree bend. The 40 degree tube has straight sections of 5 and 6 inches (125 and 150mm). The 50 degree tube has straight sections of 4 and 5 inches (100 and 125mm). On both tubes, the centerline bend radius is 4 inches (100mm). The straight sections can be shortened if needed with a hacksaw or tubing cutter.