Trade in your box spring and traditional bed frame and trade up to the Zinus SmartBase Compack 14 inch Mattress Foundation, Queen. This innovative foundation provides the even and sturdy surface of a box spring and even more stability than a traditional bed frame with its multiple support legs crafted from thick and durable steel. And if all that weren’t enough, you can also use this ingenious frame to store more under the bed than ever before with its 12.5 inches of clearance space. All steel parts, tools and step-by-step instructions arrive at your door in one slim and compact box, so maneuvering and setup take less than an hour. This rock-solid support system is also backed by our 5-year worry free warranty, so you can rest even easier. The SmartBase® is the headache-free way to do bedtime, and thousands of positive reviewers seem to agree! Age Group: Adult, Universal.