Romina Uptown Full-Bed Conversion KitThe conversion kit allows to you transform your Convertible Crib (Model #15503) into a full size bed. This item consists of two side rails and two sets of slats which allow you to use the mattress directly onto the newly created platform without purchasing a box spring. Made of 100% solid wood and finished with the same organic non toxic finishes, your healthy and non toxic nursery is now becoming big kid's room to be used for many years to come.