Ducts of metal for ventilating and air-conditioning installations; Ducts of metal, for central heating installations; Faucets of metal for casks; Metal clamp-type fasteners for holding in place curtains, tarps, canvas, cloth and film covering material; Metal clapboard; Metal clips for general use; Metal decking; Metal fireplace screens; Metal hooks; Metal lids; Metal nipples; Metal vent cover for HVAC ducts; Metal vent covers for roof deck protrusions, drains and pitch pans; Metal window scre...