Rugged Liner E-Series Hard Folding Truck Bed Tonneau Cover | EH-F5515 | fits 15-18  Ford F-150 5.5ft., 5'5" bed Constructed of top and bottom aluminum panels with a slid foam core for enhanced strength and durability Easy on or off in less than six minutes; drive with the cover in the open or closed position Comes completely assembled in the box with no loose parts - no tools required for installation Double layer sealed hinges provide a tight seal to help keep water out Backed by a 3-year warranty