Section 15 Base metals and articles of base metal 74 Copper and articles thereof 74 07 Copper bars, rods and profiles 74 07 21 - - Of copper-zinc base alloys (brass) 74 07 21 00 - - Of copper-zinc base alloys (brass) Commodity Code Description 74 07 21 00 000 - - Of copper-zinc base alloys (brass)