3403.91.50.00 - Other

This HTS subcategory, 3403.91.50.00, specifically covers preparations used for the treatment of materials other than textile materials, such as leather, furskins, and other substrates. These preparations are designed to impart specific properties or facilitate further processing of these materials, drawing their lubricating or surface-modifying characteristics from components other than petroleum oils or oils obtained from bituminous minerals, which constitute 70 percent or more by weight.

Distinct from its sibling category, 3403.91.10.00, which is exclusively for preparations applied to textile materials, this classification focuses on a broader range of non-textile applications. The key differentiator lies in the primary substrate being treated; if the preparation's intended use is for leather goods, furs, or other materials that are not textiles, then it falls under this designation.

As a leaf node, this subcategory does not have further subdivisions. Therefore, classification into 3403.91.50.00 relies heavily on understanding the intended application and composition of the preparation. Examples might include specialized finishing agents for leather, conditioning treatments for furs, or release agents for molds used in the manufacturing of non-textile goods, provided they meet the specified compositional criteria outlined in the parent heading.