4005.91.00.00 - Plates, sheets, and strip

This HTS classification, 4005.91.00.00, specifically covers compounded rubber, unvulcanized, that is presented in the form of plates, sheets, or strip, and falls under the "Other" designation within this broader category. This means it encompasses such forms of compounded rubber that are not specifically itemized in preceding subheadings of 4005. The key characteristic is that the rubber has undergone compounding processes but has not yet been vulcanized, and its physical presentation is as flat, continuous forms.

Within the "Other" classification (4005.9), this particular subheading (4005.91) differentiates itself from its sibling, 4005.99.00.00, based on the visual or physical form of the compounded, unvulcanized rubber. While 4005.91 focuses on the specific forms of plates, sheets, and strip, the sibling category 4005.99.00.00 would cover any remaining "other" compounded, unvulcanized rubber that does not conform to the shape parameters of plates, sheets, or strip. This distinction emphasizes the importance of physical configuration in tariff classification.

As this is a leaf node within the HTS structure, there are no further subcategories to introduce. Therefore, classification under 4005.91.00.00 hinges on the confirmation that the goods are indeed compounded, unvulcanized rubber, and that they are presented in the form of plates, sheets, or strip, thereby excluding any other forms or states of compounded rubber.