The adjustable Neco trolley set for upper hanging rail and lower visible rail, A: 23, 2 doors, is a package with all the necessary components for the installation of the Neco trolley system. This system is designed to be used with two doors, 1 internal + external 1. In addition, this system allows the adjustment of doors ± 3 mm, it has the “slow” closing method that opens and closes them smoothly. It is designed to join boards with a maximum thickness of 23 mm and its components are made of steel as well as high-strength plastic. The packaging contains a set of adjustable Neco trolleys for the upper hanging rail and lower visible rail.