building materials of metal, namely, air transfer ducts and duct liners; non-electric cables and wires of common metal; ironmongery, namely, small items of metal hardware, namely, wire clamps and band clamps; tubes of metal, namely, flexible, semi-flexible and rigid tubes of metal; goods of common metal, namely, union couplings for pipes and tubes, namely, sleeves, muffs, flanges, flange sleeves, flange muffs; parts of ventilation installations, namely, metal ducts and fittings, namely, flexi...

Metal pipes and tubes; flexible metal pipes and tubes; couplings, sleeves, tees, collars, clamps, metal pipe and tube elbows; chimneys and metal chimney pipes; metal flue covers; metal fire stop panels; metal spacers