Nectarine in a 1/2 kg format, as stated in the original title. This quantity is equivalent to 500 g and refers to the total product offered, not to a weight per piece. The number of nectarines making up that amount is not specified. The information available is limited to the product name and its quantity. The variety, country or region of origin, ripeness level, as well as the presentation or type of packaging are not specified. There are also no consumption or storage instructions and no nutrition table. Therefore, it is not possible to specify these characteristics based on the data provided.