No box spring is needed with this Queen size Steel Metal Platform Bed Frame with Wood Slats. Perfect replacement and upgrade for your old bed frame and mattress foundation. Superior strength and stability from the solid steel black frame combined with flexible & durable 3.1 inch wide wooden support slats will be the ultimate bedding addition to your bedroom. 12.5 inch height of under bed space offers plenty of room for out-of-season clothing and other items.