The Steel door SDE 4210 is a solid door without glass openings. The single leaf version can be combined with a wide range of classifications according to sound, fire and smoke (SDE20,SDE30, SDE60, SDE90, SDE120). The door is applicable for exterior commercial and public environments where a high quality product is demanded; e.g. hospitals, hotels, restaurants as well as parking lots, basements, technical rooms and staircases.