Bunk Bed Size:Twin Bunk Bed, Finish:Stained and Lacquered The log bunk bed by Montana Woodworks is a classic of design and build Both the upper and lower bunks come with a "bunky board" mattress supportMaximum recommended mattress thickness for the top bunk is 6"Unique and one-of-a-kind- look reminiscent of the Grand Lodges of the Rockies, circa 1900Careful assembly by hand ensures the bed will last a lifetimeSome assembly required20-year limited warranty included at no additional charge