This mechanical system has been specially designed to avoid accidental falls of the suitcases and to facilitate the loading / unloading phases even in the presence of a very bulky central case, which could reduce accessibility and opening of the lid. New, unused, unopened, undamaged item in the original packaging (where the packaging is provided). For more details see the ad. WE DO NOT SELL USED PRODUCTS New, unused, unopened, undamaged i.