10U rack space on top and U usable space on the bottom,and there is another extra 2U space to accommodate for the depth of the mixer being used on the top rack,9mm plywood construction with laminated plastic covering,35 x 35mm aluminum section,Heavy duty corners, heavy duty T Brackets,Medium butterfly latches,medium recessed handles,attachment rails(top.front), complete rack mounting component: washers,nuts and screws,top/front covers and rear door.