Le Trap River Robber Sluice Box Gold Sluice Stream Sluice Gold Prospecting Le trap sluices are 46" long and 15" wide and will hold the finest flour gold as well as large nuggets The sluice can be configured as either a bank robber or a river robber When you purchase a new sluice it will be configured as a bank robber. If you take a saw and cut the back off the inlet side it becomes a river robber The sluice is made of high impact abs plastic and will take a lot of abuse, but should you ever get a crack or chip in it, it can be welded with abs glue, available at almost any hardware store The riffles are two-step with a ramp. This allows the sluice to be self-cleaning