Set of 3 pieces; one pump and two rubber stoppers. The Vacu Vin pump extracts the air in your wine bottle and re-seal it with the rubber stopper (non-sparkling wines). This vaccum seal provides for longer storage of your samples as the Wine Saver prevents the oxidation process. With a simple gesture, place the rubber stopper on the bottle and use the pump to empty the air until you hear a click, the bottle is emptied of the air!