DURAZDUCT

Ventilating ducts of metal, namely, insulated metal duct parts in the nature of pipes, elbows, T-sections, wye-sections, brackets, and supports, designed to exhaust potentially flammable vapors from cooking equipment

Insulated metal duct parts designed to exhaust potentially flammable vapors from cooking equipment in the nature of pipes, elbows, T-sections, wye-sections, brackets, and supports