During incubation, eggs must be turned several times a day to prevent the yolk from settling to one side and to exercise the embryo. Turning the eggs by hand is the most demanding and time consuming part of egg incubation. Specification: 15'' x 15'' x 3'', 110 Volt AC (220 Volt available for export). Each Large Egg Turner holds a total of 3 Racks to set approximately 12 duck eggs or 9 to 12 Goose eggs depending on actual egg size.