Barbed wire; Cable ties of metal; Ducts of metal for ventilating and air-conditioning installations; Ducts of metal for ventilating installations; Magnetic alloys; Metal hexes; Metal molds for forming cement posts, wall panels for building; Metal vent cover for HVAC ducts; Metal vent covers for roof deck protrusions, drains and pitch pans; Prefabricated aluminum ventilating ducts for installation in residential and commercial garage doors; Ventilating ducts of metal