This black twin over twin metal bunk bed with Trundle 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: 250/350/350 Lbs. Assembled dimensions: 78.00""L x 41.75""W x 62.25""H product weight: 99.88 lbs. Delivered as 1 set in 1 carton (package size: 80.88""L x 14.35""W x 7.55""H, 105.40 lbs).