KEY DETAILS Concrete and 99.9% recycled Styrofoam mixture. Heavily sealed surface to repel acids and liquids over long-term use. Hidden adjustable feet to slide easily. Suitable for indoor or outdoor use. Due to its handmade quality, variations in fades and naturally occurring embellishments make each piece beautifully unique. This contract-grade item is manufactured to meet the demands of commercial use in addition to residential. See more .