Designed for many years of use, the Ben convertible crib features a three-position adjustable mattress support base. The Ben is certified by the Juvenile Products Manufacturers Association (JPMA) and is meticulously tested to meet or exceed all applicable Consumer Products Safety Commission (CPSC) and American Society for Testing and Materials (ASTM) safety standards to ensure the safest sleeping environment for your child. Maximum child height for crib stage (35 inches); Maximum recommended weight limit for toddler bed and daybed stage (50 pounds). Conversion Kit sold seperately.