Set of 3. Use 3 per setting tray (item No. 3067) to hold approximately 12 to 18 large eggs. For use with goose and emu sized eggs. Purchase these if you already have metal setting trays in your 1502 or 1500 setting incubator. If your incubator only has the setting racks (current production models) order item No. 0249 for use with large eggs. Metal setting tray shown in image not included with item No. 3059.