This black twin over twin metal bunk bed adds modern style and comfort to any bedroom while saving space. Crafted with a strong steel metal structure, it ensures durability, stability, quiet noise-free use, and large bearing capacity, plus safe stairs for easy upper bunk access. No box spring is needed-it works with all mattress types including memory foam. The package includes clear instructions, all parts and tools for hassle-free assembly. Weight limit: 250/350 Lbs. Assembled dimensions: 78.00""L x 41.75""W x 65.25""H product weight: 77.44 lbs.