Aviaries of metal; Bicycle parking installations of metal; Cabanas of metal; Chicken-houses of metal; Dispensers of metal for dog waste bags; Door frames of metal; Door panels of metal; Doors of metal; Fences of metal; Fire-dogs; Handrails of metal; Identity plates of common metal; Letter boxes of metal; Metal bird baths being structures; Metal cages for wild animals; Metal chains; Metal pet doors; Metal pre-fabricated stables; Modular metal pigsties; Palings of metal; Folding doors of metal