Specialty sheet metal, mill, lathe & duct work Cement ducts or ductwork, Plastics duct or ductwork, Rubber duct or ductwork, Glass ducts or ductwork, Stone ducts or ductwork, Non ferrous alloy ducts or ductwork, Aluminum ducts or ductwork, Stainless steel ducts or ductwork, Precious metal ducts or ductwork