Branching pipes of metal; Cable thimbles of metal; Copper pipes; Copper wire, not insulated; Ducts of metal, for central heating installations; Galvanized steel clip with molded rubber used to attach drywall to walls or ceilings; Metal cable wire; Metal cages for HVAC units; Metal chimney cowls; Metal elbows for pipes; Metal gutters; Metal pipe muffs; Metal pipe supports; Metallic doors, windows, shutters, slatted shutters; Stainless steel