The Ponzi PST L door is similar as a system (series of PONZI Hospital profiles and relative gaskets) to the PSE version and is used in operating theaters as an aesthetic continuity solution in environments where hermetic sealing is not required. The doors are in Class 1 fire-retardant for use in healthcare environments and are made with a coplanar sandwich panel, insulated 60 mm thick, with a HPL laminate surface of different colors, with the possibility of lead shielding for RX environments.