7019.73.90.10 - Weighing 185 grams or less per square meter (622)

This HTS category, 7019.73.90.10, specifically classifies open fabrics made from glass fibers (including glass wool) that are chemically bonded and weigh 185 grams or less per square meter. These materials are designed for applications where a lightweight, porous, and chemically stable fabric is required. Examples include certain types of filter media for air or liquid filtration, reinforcing materials in composites, and specialized insulation applications where a breathable fabric structure is advantageous. The defining characteristic is the combination of chemical bonding for structural integrity with a low basis weight, indicating a fine fiber construction.

Within the "Other open fabrics" subcategory, this specific heading is distinguished from its sibling, 7019.73.90.90, by the stringent weight limitation. The sibling category, also for "Other" chemically bonded open fabrics, encompasses those that weigh more than 185 grams per square meter. Therefore, the crucial differentiator for classification into 7019.73.90.10 is the precisely defined maximum basis weight.

As this is a leaf node in the HTS classification system, there are no further subcategories under 7019.73.90.10. Classification decisions at this level are final, relying on the detailed description and the specific weight criterion to ensure accurate import and export declarations.