The Chelsea crib provides safety, durability, and convenience at a great value. Constructed of heavy-duty steel with a powder coated finish that resists corrosion and scratches and is easy to clean. Mattress board adjusts to two heights for easy access to infant and so crib may be used as a bassinet. Comes with 4" casters, two locking and two non-locking. Cribs meet CPSC, ASTM, JPMA and Canadian crib safety standards. All instructions are printed in English, Spanish, and French and are permanently affixed to avoid loss. 3" high density foam mattress that meets the new Flammability Standard CFR 1633 is included. Full one year warranty included.