mali gold rush carpet ribbed sluice box carpet channel mining rug guinea gold catcher gold mines carpet alluvial sluice carpet the thickness is 10mm mali gold rush carpet ribbed sluice box carpet channel mining rug guinea gold catcher gold mines carpet alluvial sluice carpet the size is 1x20 meters/roll mali gold rush carpet ribbed sluice box carpet channel mining rug guinea gold catcher gold mines carpet alluvial sluice carpet the weight is 2.2kg/square meters