FOR HOVA BATOR INCUBATORS ONLY. During incubation, eggs must be turned several times a day to prevent the yolk from setting to one side and to exercise the embryo. Turning the eggs by hand is the most demanding and time consuming part of egg incubation. Specifications: Turner hold a total of six egg racks. Each Universal Egg Rack holds 7 eggs, any size from a partridge egg up to duck eggs (total 42 eggs per turner). Each Quail Egg up to duck eggs (total 42 eggs per turner). Each Quail Egg Rack holds 20 quail eggs (total 120 eggs per turner), 15" x 15" x 3",110 Volt AC