Procoss sheet metal wing-opening double doors, fastened directly onto the shelf uprights, come with handles and cylinder locks. They can be assembled on single-bay shelves to form single cupboards, or across several bays of shelves to form a set of cupboards. 880 mm doors fit 1000 mm high shelf units, 1880 mm doors fit 2000 mm high shelf units, and while 2380 mm doors fit 2500 mm high units. The shelf units must have base plinth plates. Multiple cupboards can be built upwards, in which case, a plinth plate should be fitted between the two doors.