7407.21.70.00 - Having a rectangular cross section

This HTS category, 7407.21.70.00, specifically covers bars and rods of copper-zinc base alloys (brass) that possess a rectangular cross-section. These items are formed through processes like extrusion or drawing, resulting in a shape with four sides and distinct length, width, and thickness dimensions, where the width and thickness are greater than the height. The material composition must adhere to the definition of a copper-zinc base alloy, commonly known as brass.

This classification distinguishes itself from its sibling category, 7407.21.90.00 ("Other"), by the precise geometric form of the cross-section. While 7407.21.90.00 would encompass bars and rods of brass with any other cross-sectional shape (e.g., square, circular, hexagonal, or irregular), this category is exclusively for those with a distinctly rectangular profile. The primary differentiating factor is the geometric configuration.

As this is a leaf node in the HTS classification structure, there are no further subcategories. Therefore, the focus for classification into this code rests entirely on confirming the material composition as a copper-zinc base alloy and the physical characteristic of having a rectangular cross-section. The broader context for this category is established by its parent classifications, identifying it as a specific form of copper alloy bar or rod within Chapter 74.