7407.29.16 - Hollow

This HTS category, under 7407.29.16, specifically addresses hollow articles made from copper alloys that do not fall under the more specific categories of copper-nickel base alloys or copper-nickel-zinc base alloys. These hollow articles are essentially profiles, meaning they possess a cross-sectional shape other than solid bars or rods. The "hollow" designation is the primary distinguishing characteristic at this level, indicating a void or cavity within the profile's structure.

To differentiate, the sibling category ": Other:" at this same level likely refers to solid profiles of copper alloys that are not specifically classified elsewhere within the subheadings of 7407.29.16. This current category, however, is exclusively for hollow profiles. The purpose of this distinction lies in the manufacturing process and potential end-uses, where hollow structures often serve different functional roles, such as conduits, tubes with complex shapes, or components requiring lightweight strength.

The subcategories within 7407.29.16.10 and 7407.29.16.80 further refine the classification based on the specific composition of the copper alloy. 7407.29.16.10 is reserved for hollow profiles made from copper-nickel base alloys (cupro-nickel) or copper-nickel-zinc base alloys (nickel silver). Consequently, 7407.29.16.80, "Other," encompasses all remaining hollow profiles of copper alloys that do not fit the composition described in the preceding subheading. This hierarchical structure ensures accurate and detailed classification based on both form and material.