Product details:

Low profile design that results in customized look and gas savings from 10% to 13%. Weather tight sealed to protect your cargos from moisture & dirt Completely assembled for easy installation. Bed side rails or cargo rack will need to be removed to install this cover. (Works with Under-the-Bedrail bed liner. If you had an Over-the-Bedrail liner, you will need to cut small 2 x 4 holes in the liner to fasten the clamps. ) Item Dimensions: 72" L x 36. 4" W x 4. 1" H.