Product details:

The Next Generation Bed Frame Casey 18 inch Premium SmartBase Mattress Foundation by Zinus eliminates the need for a box spring as your memory foam, spring, or latex mattress should be placed directly on the Premium Smart Base. The Premium SmartBase works especially well for lower profile six-, eight- and 10-inch mattresses, giving your bed a "lift" for extra storage as well as ease of use. Uniquely designed for optimum support and durability the strong steel mattress support has multiple points of contact with the floor for stability and prevents mattress sagging, increasing mattress life. The Premium Smart Base bed frame is 18 inches high with 16.5 inches of under the frame for four extra inches of under-bed storage space. With plastic caps to protect your floors and an innovative folding design to allow for easy storage, the Smart Base is well designed for ease of use. Another comfort innovation from Zinus. Pioneering comfort.With Storage
UNDERBED STORAGE - Total of 13 inches of clearance space under the frame provides valuable storage room for extra odds and ends
Mattress sold separately