METAL BUNK BED BLACK W311120498Modern style and comfort to any bedroom,save space Sturdy System: strong steel metal structure for durability & stability, quiet, noise free and large earing capacity, safe stairs, Twin over twin bunk beds create a cosy space for your child Easy Assembly: The package includes clear instruction,all parts and tools,very easy to assemble No box spring needed: This bed frame no box spring needed, can be used with all mattress types including memory foam