7019.66.40.10 - Weighing 185 grams or less per square meter (622)

This HTS category encompasses mechanically bonded open woven glass fiber fabrics that are not colored. These fabrics are specifically characterized by their plain weave construction and a weight of less than 250 grams per square meter. Furthermore, they are composed of filaments where each single yarn measures no more than 136 tex. The "Other" designation indicates that this particular subcategory includes fabrics that do not meet the specific criteria of the sibling categories listed.

This classification distinguishes itself from its siblings primarily through its precise weight and filament fineness. Sibling category 7019.66.40.21, for instance, covers fabrics weighing *more* than 215 grams per square meter with a filament diameter specifically between 7 and 13 microns, indicating a distinct physical property. Category 7019.66.40.96, also designated as "Other," would likely capture fabrics that fall outside the very specific weight and filament specifications of this current node and the other sibling.

As this is a leaf node in the HTS classification system, there are no further subcategories beneath 7019.66.40.10. Therefore, the classification ends at this point, and any product falling under this description would be classified here, provided it meets all the preceding criteria of plain weave, less than 250 g/m², single yarn not exceeding 136 tex, and is not colored. The defining characteristic for inclusion in this specific category is the weight requirement of 185 grams or less per square meter, distinguishing it from other potential fabrics that might be heavier but still under 250 g/m².