Since 1992 Metropolitan Air Technology LLC. (MAT) has combined creative engineering, excellence in manufacturing and unmatched service in an exceptional line of reliable and durable remote controlled balancing dampers that provide airflow balancing for inaccessible ducts and take-offs.The product line offers recessed, or minimally visible access points and is easy to install and operate. Our patented technology provides a powerful, one-of-a-kind solution for tough design problems.