2014325 ensp 0183 enspFIG 2B is an exploded view of a third and fourth stacked tray of the fourth tray Gold Cube concentrator device with a vortex mat on each third and fourth tray along with the pump and lower hose section FIG 3 is a side crosssectional view of the Gold Cube concentrator device in a four stack embodiment along section lines 3 3 of FIG 1