Sisneros Bros. Mfg. is a family owned and operated business located in central New Mexico. We manufacture high quality rectangular, round and oval ductwork for commercial and industrial applications. We build Welded Stainless Steel and Aluminum duct, round G90 Galvanized Spiral pipe, double wall duct, round volume control dampers along with plenty other sheet metal duct products. Our round dampers are approved by Wal-mart, we have provided aluminum ducting for over 200 ships in the US Navy fleet, and provide high quality duct to some of the largest, semiconductor mfgs, food manufacturers and pharmaceutical companies in the world. We also have ductwork on all seven continents.