Premium Twin over Full Metal Bunk Bed is a sturdy, metal frame bed that is perfect for a kids’ bedroom or guestroom. Boys and girls alike will love the secured easy to climb angled ladder and the 12.5” full length guard rails will keep your child safe and secure while sleeping on the top bunk. The mattress platform includes 22 metal slats spaced 3” apart to provide ample support and air flow for a mattress without the need for a box spring. This bed can be used with one twin size and one full size mattress (not included) and offers 11” of clearance for under-bed storage space. It ships in one box and assembly is easy with included tools. Assembly required.