ASSEMBLY INSTRUCTION SKU CODE: (WF303343) Follow the information on the warning label appearing on the upper bunk end structure and on the carton... Do not remove warning label from bed. Away use the recommended size mattress or mattress support, or both, to help prevent the likelihood of entrapment or falls. Surface of mattress must be at least 5 inches below the upper edge of guard rails. Do not allow children under 6 years to use the upper bunk. Prohibit more than one person on upper bunk.