Polyester Blend Versatile, 100% waterproof shelving unit designed for showers and restrooms, or any room you choose Manufactured from robust 3mm, high quality 304 stainless-steel with an attractive Matte Black finish Ultra-thin frame provides an exquisite, finished look Sleek 10mm border blends well with any style Easy-to-install with detailed instructions included Rectangular 12" x 48" split double shelf with 22.75" of open space in between for taller items Periodically applying automotive spray wax will protect from hard water stains and mineral deposits Clean with mild liquid soap and non-abrasive sponge then rinse with clean water Never use chemicals or abrasives to clean the Niche, these can damage the factory finish Manufacturer’s Limited Lifetime Warranty