The ZINUS 12-inch SmartBase Mattress Foundation in Full size is a square-shaped, black box spring manufactured in 2022 by Zinus. With an item length of 75 inches and a thickness of 12 inches, this mattress foundation is designed for adults and features a sturdy mattress frame. It is a high-quality product from the brand Zinus, known for its reliable furniture pieces. Perfect for a bedroom, this foundation is 54 inches wide and weighs 120 pounds, providing ample support for a full-size mattress.