The ever-popular 33B tumbler offers greater capacity and an upgraded drive. Now you can polish more stones at the same time in a compact unit. Comes with twin 3 lb. rubber barrels. The rubber barrels are quiet and long wearing. The 3 lb. capacity barrels are sized for smaller stones up to 1-1/4 inches. The barrels are molded with special ribs to increase the tumbling action. Base dimensions 6.25″W x 10.25″L.