Material finishes: The metal tabletop is finished with a high-quality, marble finish. The steel frame is protected with a rich and durable, modern black powder coating finish. Durable Metal Frame: The modern design is made from strong metal frame to ensure a durable structure that effortlessly handles the tasks of everyday life. 4-pcs Round Metal Coffee Table Set: 16" diameter table: 16" W X 16" D X 21" H. 18" diameter table: 18" W X 18" D X 19" H. 20" diameter table: 20" W X 20" D X 17" H. 30" diameter table: 30" W X 30" D X 15" H. Easy to Assemble, Easily Cleaned, and Lightweight. Only one screw for a small table. Easily assemble one table in a minute. The 30" table only has 3 screws and 4 nuts. Should be assemble in three minutes. The table top and the frame are very easy to clean.