6806.10.00.90 - Other

This HTS classification, 6806.10.00.90, encompasses "Other" mineral wools, rock wools, and similar mineral wool products not specifically listed under the preceding subheadings. This category is intended for bulk forms of these insulating materials that do not fit the definitions of batts (regardless of width) or pipe coverings. It serves as a residual category for slag wool, rock wool, and intermixtures thereof that are presented in a loose, fibrous state suitable for various insulation applications.

Distinguishing this category from its siblings is crucial for accurate classification. Subheadings 6806.10.00.20 and 6806.10.00.40 specifically cover batts, defined by their dimensions and intended use as pre-formed insulating panels. Similarly, 6806.10.00.60 is reserved for pipe coverings, which are shaped to fit around cylindrical surfaces. Therefore, 6806.10.00.90 applies to all other forms of these mineral wools that are not manufactured into batts or specifically designed as pipe coverings, such as loose-fill insulation or bulk fibers.

As this is a leaf node in the HTS structure, there are no further subcategories. Classification into this "Other" category is determined by the exclusion of goods from the more specifically defined sibling categories. Importers and exporters should ensure that their mineral wool products are not presented as batts (of any width) or as pipe coverings before classifying them under this residual subheading.