The Large Kirribilli base is manufactured of high-quality cast iron with a black texture finish. This base is fitted with the self-leveling FLAT technology providing the ideal solution for those pesky wobbly restaurant tables. The revolutionary FLAT technology means these table bases remain stable no matter where they are placed. Regardless of how times they are moved, they automatically adjust to the surface below, locking firmly into position. Also, when two tables are pulled together to accommodate a larger party, the FLAT technology allows you to make the top surfaces of the table flush thus eliminating the dreaded ledge.