Double-layer floating wall shelves give you twice the display space without taking up floor room use them in living areas, bedrooms, bathrooms, closets or kitchens for books, plants, photos or spices. Built from thick particleboard and a powder-coated metal frame, each shelf holds up to 40 lb. The set includes two kinds of expansion screws so you can mount on concrete or hollow walls all hardware and a step-by-step guide make installation quick and wipe-clean upkeep simple. weight: 0.66 pounds. Length: 5.30 inch. Width: 15.00 inch. Height: 15.70 inch.