Our gold wash plants use water pressure from a 3" water pump to vibrate upper sluice box; gold then enters 1/4 in. mesh to bottom sluice where it is trapped in hog moss beneath expanded metal. This machine is very portable in those hard to get to places. It can either be used for a test plant for prospecting or a small mining operation. The hopper has a self dumping grizzly, which keeps out the bigger rocks from compromising production or damage to machine. The machine is capable of 15 yards and hr. machine is tested at 98% gold recovery. Call for pricing and availability.