Ventilation port, particularly for bodies of trucks, trailers or the like

A ventilation port (1) particularly for bodies of trucks, trailers or the like, suitable to be fitted at a through opening (2) in a wall (3) of the body, which comprises an inner box-like element (4) and an outer box-like element (5) with perforated bottoms (6,7) and with sides (8,9) which are provided, at one end, with edges (10,11) which are folded outwardly at right angles and are adapted to cover the borders of the opening (2) of the wall and, at the other end, with respective end bands (12,13) for telescopic coupling.