Zinus Full Metal Smart BoxSpring®

Features Steel interior frame with knitted polyester cover. Unlike a traditional box spring, the Smart box spring is made of solid steel that comes together in no time. Durable steel is used to construct the inside framework of this foundation; slats are spaced 6 - 7 inches apart. Weight Capacity: twin size supports a maximum weight capacity of 350 lbs, while all other sizes can support up to 700 lbs. A 5 inch height is perfect for taller mattresses or for those who enjoy their bed lower to the floor. A 9 inch height is perfect for shorter mattresses or for those who enjoy their bed higher off the floor. All parts, tools and instructions are packed into one compact box that ships straight to your door. Box spring only, a bed frame or platform bed is required to support this foundation and is sold separately.