Master Flow Metal Pipe is available in a variety of common lengths, diameters and gauges to help make your next HVAC project a success. Round pipe can be used as a main trunk line or branch line, as well as in return air situations. It maintains the most efficient characteristics for airflow and is common throughout the country. A simple snap lock design and sturdy galvanized steel construction on Master Flow pipe creates a quick and secure installation that you can rely on.. Brand/Model Compatibility: Universal. HVAC application: All HVAC types. Product Weight (lb.): 9.6 lb. Returnable: 90-Day. Product Depth (in.): 12 in. Product Height (in.): 60 in. Product Width (in.): 12 in