JOBE sluices are designed with a riffle set containing both Hungarian and stream riffles. Both types of riffles are designed to create turbulence that deposits the gold and other heavier values behind the riffles. The first three riffles in the sluice are stream riffles, that are shorter and designed to work with minimum water flow. These are followed by three Hungarian riffles which work better with a more aggressive volume of water. Therefore the JOBE sluices work well in a wide variety of circumstances.