Section 05 Mineral products 26 Ores, slag and ash 26 02 Manganese ores and concentrates, with a manganese content of >20% 26 02 00 Manganese ores and concentrates, including ferruginous manganese ores and concentrates.. 26 02 00 00 Manganese ores and concentrates, including ferruginous manganese ores and concentrates.. Commodity Code Description 26 02 00 00 000 Manganese ores and concentrates, including ferruginous manganese ores and concentrates..