The GQF Mfg Automatic Egg Turner turns eggs several times a day during incubations to prevent the yolk from setting on one side and to exercise the embryo. Holds a total of six egg racks. Each universal egg rack holds 7 eggs, any size from a partridge egg up to a duck egg (total 42 eggs per turner). CAN BE USED WITH ALL HOVA-BATOR INCUBATORS.