http://www.grumpyprospector.com/ UnderFlow Sluice Box Gold Mining Equipment Available at www.grumpyprospector.com Black Sand is no match for Fine Gold and the UnderFlow Sluice. The UnderFlow Sluice Design can collect ALL your Gold. From Large Nuggets all the way down to Microscopic Gold/Platinum. No longer a need for "several" expensive Machines and Equipment just to get all your Gold you pull from the Earth. On System with minimal configurations will get ALL the Gold you can pull up, with 99.9% efficiency. Also to include: An all inline short tolerance Multiple Classification System Designed Specifically for Dredging Opperations. That can capture 1" Nuggest to Micon Gold in one short Proven System!