Adjustable Neco trolley set for supported upper rail and 2-door concealed lower rail, is a package that contains each essential element for mounting sliding wardrobe doors. The system enables smooth closing and opening thanks to the soft closing. This trolley set can hold door panels up to 50kg maximum together. Its manufacturing materials are plastic and steel, providing quality and resistance. It has a vertical adjustment of doors ± 3 mm and is enabled to allow panels up to 23 mm thick. Its packaging contains a set of Neco carts.