Set of Six - Each No. 1502 Incubator tray will hold 4 quail egg racks (456 quail eggs). Molded post on each rack permits double stacking for total of 1368 eggs. Plastic egg rack positioners offer the most efficient system for gathering, spray disinfectant treating and storing eggs. At time of setting eggs, just remove loaded egg rack positioners from storage area to the incubator setting trays. (Caution: GQF Hatching trays hold a maximum of 250 quail eggs).