Solid Honduran Mahogany. Extension mechanism patented by Joseph Fitter Ltd, Britannia Works Birmingham (Crank Included). Three configurations (refer to photos) Dimensions (L x W x H): -0 Leafs: 41-1/2" x 41-1/2" x 30-1/4" -1 Leaf: 62-1/4" x 41-1/2" x 30-1/4" -2 Leafs: 83" x 41-1/2" x 30-1/4"