We upgraded the bathroom shelf with 2 mounting holes on each side, make it sturdier than before, won’t pull away from the wall.The 0.3-inch thickness of tempered glass provides excellent safety and stability. Holds a maximum load of 40 pounds according to our load bearing test.Glass Wall Shelf (L 15.7in * W 4.5in * H 5.9in) provides the right amount of storage space for all your toiletries. The 3-Tier floating shelf adds space and organization anywhere in your home.Glass Shelf can be installed by an adhesive method or drilling method. Adhesive Install: A simple procedure using our specialized glue to mount it on various surfaces such as ceramic tiles, smooth marbles, glass, metals, and solid woods.