5101.30.15.00 - Other wool, finer than 40s but not finer than 44s

This HTS category, 5101.30.15.00, specifically classifies carbonized wool that has not undergone any further processing beyond the carbonization stage, and where the wool falls within a defined micron count range. This means the wool fibers have a fineness that is coarser than 40s but not finer than 44s. Carbonization is a process used to remove vegetable matter from wool, typically using acid, leaving the animal hair behind.

The distinguishing feature of this category, compared to its siblings, lies precisely in the specific fineness range of the wool. Category 5101.30.10.00 covers unimproved wool or other wool not finer than 40s, indicating a coarser fiber diameter. Conversely, 5101.30.30.00 and 5101.30.40.00 encompass wools that are finer than 44s, potentially leading to different end-use applications and manufacturing processes.

As a leaf node, category 5101.30.15.00 does not have further subdivisions. Therefore, accurate classification hinges on verifying that the carbonized wool meets the described fineness criteria. This often involves referencing established textile standards for wool grading and ensuring that no additional treatments or modifications have been applied to the wool after the carbonization process.