Particleboard, Steel Instantly upgrade your home office décor with the Martha Stewart Emmett 3 Shelf Bookcase Sturdy Engineered Wood shelves with back and side borders in a black wood grain melamine finish Durable steel vertical support posts in oil rubbed bronze Assembly and Care Instructions: Quick and easy assembly with included tools and wipes clean with damp cloth Dimensions - 47.25"W x 13.5"D x 36.5"H; Shelf Size (3): 46"W x 11"D x 12.5"H; Maximum Static Weight Capacity: 44 LBS. Static Weight Per Shelf