he space saving design of the Metal Twin-over-Twin Bunk Bed is complemented by the sturdy welded tubular steel construction. The black and silver finish can be easily integrated into virtually any existing design. Two built in ladders make access to the top bunk safe and easy. The fully enclosed top bunk provides additional safety and peace of mind. The powder coating finish is virtually chip proof using all lead-free non-toxic paint. This bed utilizes two standard twin-size mattresses, which are sold separately. The space between the bunks measures 33.18.