Our standard grid pipe is 1.5" Schedule 40 Aluminum Pipe. It is available in Black Anodized or Mill Finish. Our pipe is made of 6061-T6 Aluminum alloy has a minimum yield strength of 35,000 pounds and a minimum ultimate tensile strength of 38,000 pounds per square inch. Aluminum pipe is approximately one third the weight of steel pipe, greatly reducing the structural load on your building. Schedule 40 Pipe has a 1.9 inch outside diameter with a wall thickness of 0.145 inches, with an inside diameter of 1.61 inches, and weighs .94 pounds per foot. We stock 1-1/2" Schedule 40 pipe in 10 foot and 20 foot lengths. We will cut to any size needed. Priced per 20 foot sticks.