LANGRIA 4 Tier Wire Shelving Commercial Storage Rack for Organization with Adjustable Leveling Feet Shelving Unit, Grey LONG LASTING MATERIAL: constructed with all sturdy metal parts and supports, not easy to wobble and damage during use, holds up to 44lbs (20kg) of evenly distributed weight SILVER FINISH: painted in a silver waterproof finish that naturally matches most colors and design schemes and that protects the unit from any water, rust or corrosion, perfect for home and office decor EASY TO ASSEMBLE: drops into a frame and interlocks with the frame itself, just slides the top of the clips to keep in place and chooses every shelf height, super easy assembly without any tools SPACE SAVING STORAGE: with 4-tier strong and sleek wire shelves, it gives you plenty of storage options to store your books and other objects ADJUSTABLE FEET: features the rubber-ended feet, effortlessly to adjust so as to reinforce and keep the bookshelf in good place, suitable for any uneven floor