7218.91.00 - Of rectangular (other than square) cross-section

This HTS category, 7218.91.00, specifically classifies semi-finished products of stainless steel that are of a rectangular cross-section, excluding those that are square. These products are further defined by their dimensional ratios. This designation is critical for distinguishing these particular stainless steel shapes from other semi-finished forms or stainless steels falling under different HTS chapters.

Within the broader category of "Other" semi-finished stainless steel products (7218.9), this subcategory differentiates itself from its sibling, 7218.99.00 ("Other"), by the precise geometrical characteristics of its cross-section. While 7218.99.00 encompasses all other non-specified semi-finished stainless steel products, 7218.91.00 is reserved for those with a rectangular, non-square profile.

The further subdivision of this category is based on the width-to-thickness ratio of the rectangular cross-section. The primary distinction within this node is between products where the width is less than four times the thickness, and the subsequent subcategory, 7218.91.00.60, which covers those where the width is at least four times the thickness. This granular level of classification ensures accurate import and export processing based on precise physical specifications.