Pre-drilled holes along the frame allow the shelves to be set at different heights or angles, and the unit can be assembled two ways depending on which corner it has to fill. Shelves measure 26 x 13 in with 12.5 in between them; the top holds 110 lbs and the middle and bottom 66 lbs each. The frame is metal with engineered wood boards, 27.5 x 14 x 32 in and 26 lbs. An anti-toppling device is supplied. Black finish keeps it recessive in the corner of a study or a living room.