The Super-Mega Side Arm is great for attaching a moving light to a vertical pipe or truss tube. The extremely sturdy construction will hold everything steady. The Super Mega Side Arm is constructed by welding a 1-1/2" (1.9" OD) schedule 80 6061T-6 aluminum pipe to a 6" section of the Mega-Coupler base extrusion with a welded gusset to really support the load. The Super-Mega Side Arm is available in 6" increments in lengths from 12" to 36".