Vibratory tumbling is an economical finishing technique which gives you a more uniform finish on large quantities of parts, in much less time than standard hand finishing, without the mess. It maintains the overall shape of the pieces and allows you to check the progress of the work without stopping the unit. Compact, yet durable, the Vigor® vibratory tumblers are donut shaped for uniform polishing and maximum coverage. The heavy polyethylene lids and bowls remove easily and quickly for emptying and cleaning. Units have two valves and a strainer for optional flow-through operation. Ball-bearing motors operate at relatively low noise levels, have thermal overload protection and are 3000 RPM at 60/Hz. One-year warranty. Made in USA.