Metals Service Center Manufactures Sheet Metalwork Stainless steel ducts or ductwork, Precious metal ducts or ductwork, Copper ducts or ductwork, Flexible ducts, Rigid ducts, Magnesium ducts or ductwork, Ferrous alloy ducts or ductwork, Titanium ducts or ductwork, Tin ducts or ductwork, Brass ducts or ductwork, Lead ducts or ductwork, Bronze ducts or ductwork