7019.72.90.30 - Silica filament fabric of filaments with silica content greater than 93 percent (622)

This HTS classification, 7019.72.90.30, specifically covers silica filament fabrics where the filaments themselves possess a silica content exceeding 93 percent. These fabrics are characterized by their high silica composition, contributing to properties such as high temperature resistance and inertness. They are derived from glass fibers, falling under the broader category of woven fabrics of glass fibers.

At this specific level, this subcategory distinguishes itself from its sibling, 7019.72.90.60, by the explicit requirement of a >93% silica content in the filaments. The sibling category, "Other," would encompass silica filament fabrics that do not meet this stringent silica purity threshold. The classification is further refined by its position within the hierarchy, indicating it is a type of "Other" closed fabric that is "Colored."

As this is a leaf node, there are no further subdivisions within this HTS code. Therefore, classification decisions at this point rely on accurately identifying fabrics that meet all the preceding criteria: being a woven fabric of glass fibers, a chemically bonded fabric, an "other closed fabric," an "other" type within that grouping, and specifically "colored" with filaments of greater than 93 percent silica content. Examples might include specialized high-temperature insulating fabrics or components for industrial filtration where extreme heat resistance is paramount.