Subheading 740710: Copper; Bars, Rods and Profiles, of Refined Copper
Subheading 740721: Copper; Bars, Rods and Profiles, of Copper-zinc Base Alloys (Brass)
Subheading 740729: Copper; Bars, Rods and Profiles, of Copper Alloys (other than Copper-zinc … etc.