740311 Refined copper: Cathodes and sections of cathodes
740312 Refined copper: Wire bars
740313 Refined copper: Billets
740319 Other Refined copper
740321 Copper-zinc base alloys (brass)
740322 Copper-tin base alloys (bronze)
740323 Copper-nickel base alloys (cupro-nickel) or copper-nickel-zinc base alloys (nickel silver)
740329 Other copper alloys