The double barrel Lortone 33B Rotary Rock Tumbler features a larger capacity, 10-sided barrel, a popular size for tumbling stone, brass cartridges, castings and more. It's easy to use, even for a beginner, but produces beautiful results. Each molded-rubber barrel has a 3-pound capacity for a total of 6 pounds. Steel body is strong and stable. Dimensions 6.5 L x 10.25 inches. Lortone quality is backed by a one-year warranty from the manufacturer.