This copper siever tray is only suitable for our Copper Rotating Column Alembic Still model (Ref. 7015). Is a very useful accessory to the distiller, since when placed in the bottom of the column alembic part, allow the matter to be distilled not into direct contact with the bottom of the column area, thus avoiding a possible "browning" of the matter to be distilled. The capacities listed refer to the capacity of the still to which these are recommended.