6 Aluminum windows, doors, sliding doors, balcony doors, bi-folding doors, slim doors and fire-rated doors; curtain walls of aluminum; aluminum fall prevention devices for floor-to-ceiling windows; aluminum door thresholds, window sills, window sill sliding closures, window sill holders and window sill flashing; aluminum balcony edging bars, balcony weather bars, shutter guide rails, sun blind guides, balcony step exits, terrace step exits, window frame edges, wall cladding, window sill edges flat roof edges and window weather bars