Product Description Material: aluminum Triangle size: 30 * 22.5 * 6 cm Four corners size: 32.5 * 13.6 cm Color: matte elegant black />Product choice: single-layer triangle / four corners, double-layer triangle / four corners1.No Drilling: powerful adhesive (nail-free) for screw-free installation, it is strong enough to hold up to 20 pounds without the damaging the wall. You can also choose to install screws to hold heavy items up to 50 pounds. Both ways are easy and quick. 2.Self-cleaning waterproof: The drain holes design not only supports the dry and tidy shower corner shelf, but also prevents the necessities from slipping. Idea for bathroom, bedroom and kitchen, safe for shower stuff, makeup stuff and food. 3.Corrosion Resistant & Rustproof: Resistant to corrosion, daily scratches, tarnishing, printing or water stains. Always keep your bathroom beautiful. Ensuring durability and reliability.4.CONTEMPORARY DESIGN- The timeless lookMatte aluminum and liquid base coat, it can be well matched with different interior styles. Thanks to the slits, the water can drain away and they don't mold inside. Also, they are super clean.5.Multiple Installation Methods- Seamless patch, glue and drilled for easy installation, saving time and effort.