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 any size from a partridge egg up to duck eggs (total 41 eggs per turner), and with the quail egg racks in place the turner will hold 120 quail eggs. 15'' x 15'' x 3'',110 Volt AC (220 Volt available for export). CAN BE USED WITH ALL HOVA-BATOR INCUBATORS.