Towed stairs make a good impression because of their simple and safe handling along with a low weight. They can be used easily, rapidly and safely on the airport's apron. Their high degree of stability under load together with non–slip steps made from special aluminium sections, the optional lighting and the non–slip rails afford a high degree of safety. Solar cells are an additional option, which automatically recharge the batteries and in this way contribute to both a reduction of the operating costs and the protection of the environment.