Operational since 1946, Southwark Metal Manufacturing is one of the largest, family-owned providers of prefabricated sheet metal ducts and fittings throughout the United States. It manages a staff of more than 1,000 employees. The company stocks over 3,000 items and offers delivery services. It offers a range of elbows, angles, register boots, and trunk duct and fittings. Southwark Metal...