Metal and plastic, the trays are plastic and the pillars are iron. Utility rolling cart is equipped with 4-heavy duty and lockable casters with 360°rotation. It is easy to move or stay stable as needed. 3-Tier utility rolling cart comes with assembly tools, it only takes 5-10 mins to set it up. The classic color and design makes this storage cart better match the decoration style of your home or office. Color: White.