"Arizona developed and tested gold concentrator. The F4 Cyclone Gold Concentrator uses the same principle that nature uses to deposit the gold. This age old design has been re-engineered to recover more gold from any concentrates. I have tested this in the fine sands of the desert and the silty soils of Alaska. Why spend hours finish panning? The F4 Cyclone Gold Concentrator will quickly recover the mico gold from your concentrates. Using prescreened concentrates and you will recover the finest gold. This video is a demonstration of the effectivness of this invaluable finishing tool. I have recovered gold by processing other's tailings! Simple to use and a third of the cost of the competitors. Use with your 12 volt pump, garden hose or even the bath tub facuet. Did I meantion it is hand made?