Our 4-Tier Bookshelf is great for enhancing organization in both businesses and homes. Use to keep books, catalogs, magazines, and small supplies neatly arranged and easily available. Chrome-plated steel construction Hardwood insert for solid surface (4) 800 lb capacity (evenly distributed) wire shelves adjust in 1" increments 4"h ledges and 9"h dividers keep stored items contained and organized Made for indoor use, dry storage only To securely set and easily release shelves, tap their corners with arubber mallet. View ourWire Shelving Size Guideto see actual outer and inner dimensions.