Discovery World Furniture Twin Over Twin Bunk Bed with Twin Trundle Bed, Merlot Solid Wood Construction throughout the entire bunk bed The trundle can fit up to a 6.5" mattress; Providing a third sleeping surface which is great for sleepovers or it can be used as one big storage unit Bed separate into two individual twin beds; Use one upright from the bottom and one from the top so both beds have a bigger headboard than footboard All Discovery World Furniture beds are tested and certified to meet the ASTM 1427-07 regulations set forth by the Consumer Product Safety Commission Slat kit is included with the bunk bed making it mattress ready; No need to purchase a Bunkie board or box spring; Mattresses and bedding not included