Novogratz Berkshire Metal Bunk Bed, Space-Saving, Twin Size, Black Versatile to accommodate all spaces. Ideal for maximizing space. Solid metal frame construction with secure slanted ladder. Metal side rails guarantee stability and durability and 18.5-inch guardrails on top bunk guarantee safety. Fits two standard twin-size mattresses (sold separately). Includes metal slats to provide support and comfort and does not require a box spring or additional foundation. Weight limit upper bunk: 200 lb. Lower bunk: 225 lb.