Zinus 14 Inch SmartBase Mattress Foundation, Platform Bed Frame, Box Spring Replacement, Quiet Noise-Free, Maximum Under-bed Storage, Twin XL 14 inches high with 13 inches of Clearance under the frame for valuable under bed storage space No tools are required, assembles in minutes Best fit for average weight people Replaces bed frame and box spring Requires the use of SmartBase headboard brackets to connect to a headboard