6 Metal materials for building or construction, namely, ducting and fittings being elbows, tees, couplers, reducers, flanges, end caps, sleeves, wall plates, brackets, joints, risers, support struts, and attachment plates; metal covers for piping of air-conditioning apparatus or electric space cooling apparatus; metal covers for water supply pipes of metal; metal covers for drain pipes of metal; metal covers for non-metallic water supply pipes; metal covers for non-metallic drain pipes; metal fittings, namely, duct fittings being elbows, tees, couplers, reducers, flanges, end caps, sleeves, wall plates, brackets, joints, risers, support struts, and attachment plates; metal brackets, namely, metal mounting brackets for general use and use with ducting; metal saddles being metal brackets for securing pipes and ducting