5106.10.00.10 - Of which the average fiber diameter is not less than 34.40 microns (400)

This HTS category, 5106.10.00.10, specifically classifies yarn spun from carded wool, intended for industrial or commercial use rather than direct retail sale. A key defining characteristic of this yarn is its fiber diameter, which must be 34.40 microns or greater. This technical specification is crucial for distinguishing between different types of wool yarns based on their coarseness, impacting their end-use applications and properties.

The primary distinction for this subcategory lies in the specified average fiber diameter of not less than 34.40 microns. Its sibling category, 5106.10.00.90, covers "Other" carded wool yarns that do not meet this specific fiber diameter criterion. Therefore, classification into this particular code hinges directly on meeting or exceeding the 34.40-micron threshold, indicating a coarser type of wool yarn.

As this is a leaf node within the HTS, there are no further subcategories branching from this specific classification. This means that once a yarn of carded wool, containing 85 percent or more by weight of wool, is identified as having an average fiber diameter of not less than 34.40 microns, it is definitively classified under this code. Classification at this level is based solely on the material composition, carding process, intended use (non-retail), and the specific average fiber diameter.