What We Like About the Serenity Crib with Clear HeadboardFoundations Serenity Hardwood Child Care Cribs are the most widely used cribs in U.S. day care centers. Designed for safety comfort and convenience all cribs are solid hardwood with durable har dware for years of reliable use. Smooth plastic teething rails protect child and crib while making it easy to sanitize. Features include 2`` solid- rubber ball bearing casters (2 locking) and steel caster brackets to reinforce legs. All cribs meet or exceed CPSC and ASTM crib safety standards and are compliant with CFR 1633 fire standards. Instructions are permanently affixed to avoid loss and are printed in English and Spanish. Full one year warranty include