Section 15 BASE METALS AND ARTICLES OF BASE METAL 74 COPPER AND ARTICLES THEREOF 74 08 COPPER WIRE. 74 08 22 WIRE OF COPPER-NICKEL BASE ALLOYS (CUPRO-NCKL)/COPPER-NCKL ZINC BASE ALLOY Commodity Code Description 74 08 22 00 WIRE OF COPPER-NICKEL BASE ALLOYS (CUPRO-NCKL)/COPPER-NCKL ZINC BASE ALLOY