Installing this 72 inch mantel shelf over fireplace not only makes your home more elegant, but also provides an excellent storage and display space for your favorite photos, artworks, greenery, dolls and more. Best for fireplace under 72 inch. Size: 72”W x 9”D x 5.6”H. Our large floating shelf is the first to be made of Magnesium Oxide, which is manufactured to rustic wood grain through advanced craftsmanship. Unique raw edge makes this mantel shelf decor full of the nature wood. Magnesium oxide is resistant to flames and high temperatures, you don't have to worry about fireplace sparks accidentally igniting it like other real wood, protecting your family safety! It's also 100% waterproof, makes the faux wood mantel easy to be wiped clean. It won't develop mold or odors from moisture like real wood, and can be installed directly in the bedroom. The hardness of this fireplace mantel shelf is 150% of real wood. It won't crack after being under pressure for a long time, so it has longer lifespan. Heavy duty invisible brackets allow this large fireplace mantel shelf to be mounted more securely for safe use. The whole 72” floating mantel shelve is invisible wall-mounted, very pleased to be used. Package includes a full set of sturdy metal brackets and screws, refer to the instruction manual, you can easily installed it.