This unit comes from the back of a Promaster 136 van. The desk frame is made of one inch by one inch square steel tubing. The desk surface and the drawer fronts are made of HDPE and is extremely durable. The drawers have extensions slides and very secure latches. The desk chair is attached to the desk. It slides in and out, rotates and can be adjusted in height. The backboard is part of the desk. Integrated into the backboard is a 12 V work light that has a bright and dim setting.