9-Inch Twin Size Grey Heavy-Duty Metal Box Spring Smart Mattress Foundation Quick-Assembly Durable Frame

EFFORTLESS ASSEMBLY - Tool-free design snaps together in minutes for a frustration-free setup. CUSTOMIZABLE COMFORT - Choose from two heights to create your perfect sleep oasis – 5 inches for a lower profile, or 9 inches for an extra boost. DURABLE STEEL CONSTRUCTION - Provides long-lasting support for your mattress, maximizing comfort and lifespan. WORRY-FREE WARRANTY – Sleep soundly with an included 5-year warranty.