This shelf is made of quality aluminum alloy with corrosion-resistant surface. It is suitable for humid environments such as bathroom (even in shower) and kitchen. It is designed to use in shower. With plenty of drain holes on shelf, water goes away quickly after shower. This space saver holder takes up little space yet provides large extra storage space. No tools required, Nail-free and drill-free, strong bearing capacity, the firm adhesion will not drop.Suitable for marble, drywall, glass, tile, almost any surface. In bathroom, put toiletries on storage shelves, such as shampoo, conditioner, shower gel,etc, put towel below. In the kitchen, the floating shelf can be used to put seasoning bottles, the towel holder can be used to hang towels. Also perfect for bedroom,living room, office,etc.