More room to play is what you get with the Mainstays Small Space Junior Twin over Twin Bunk Bed! Built in sturdy metal that is solid, stable and durable, this bed is designed shorter than the average bunk bed to fit smaller spaces and is the perfect option for your younger children to maximize their space. This bunk bed comes with secured metal slats so no foundation is required. It also includes full-length guardrails and an integrated ladder to provide your child with utmost safety. The Junior Small Space Bunk Bed fits two standard twin size mattresses (sold separately) and the maximum mattress height for top bunk is 6". Available in black, white and silver, this Mainstays bed will certainly add functionality while saving space!