Zinus Gene 16 Inch SmartBase Deluxe Mattress Foundation / 2 Extra Inches high for Under-bed Storage / Platform Bed Frame / Box Spring Replacement / Strong / Sturdy / Quiet Noise-Free, Twin The 16 Inch SmartBase Deluxe eliminates the need for a traditional box spring and bed frame 16 inches high with over 15 inches of clearance under the frame for valuable under bed storage space Strong steel foundation with 2 non-slip pads for mattress stability included Requires the use of SmartBase headboard brackets to connect to a headboard Worry free 5 year limited warranty