alfombra dream turf grass carpet mining dreamturf sluice box fine gold mat gold panning carpet for washing gold thickness 24mm 26mm 27mm alfombra dream turf grass carpet mining dreamturf sluice box fine gold mat gold panning carpet for washing gold size 1x15 meter/roll alfombra dream turf grass carpet mining dreamturf sluice box fine gold mat gold panning carpet for washing gold weight 80kg/roll