The Legare 59" x 18" Bookcase in espresso finish incorporates the following innovative features: Amazingly simple 2 minute tool-free assembly … Made from high quality, eco-friendly 13 ply Baltic birch hardwood … Includes four 12" width adjustable shelves & accomodates up to eight shelves ... Incredibly sturdy material has been tested to withstand weight loads exceeding 500 lbs! ... Smart adjustable shelving and concealed cable management ... Disassembles in seconds for convenient flat-pack storage or transport .