Giantex Metal Bunk Bed Twin Over Twin, Low Profile Bunk Bed Frame with Ladder & Full Length Guardrail[Space saving Low Profile Bunk Bed]: The 54" twin over twin bunk bed has a relatively compact size for low ceiling bedrooms or small apartments. In addition, the lower bunk close to the floor is safe for kids of all ages. [Heavy duty Metal Frame]: The robust metal bunk frame provides a long lifespan. With the heavy duty metal slats, each bed can hold a mattress directly and support up to 330 lbs. No box spring is needed. [Full length Safety