7019.72.40.30 - Silica filament fabric of filaments with silica content greater than 93 percent (622)

This HTS classification, 7019.72.40.30, specifically covers silica filament fabrics where the filaments themselves contain a silica content exceeding 93 percent. These fabrics are characterized by their high silica content, making them suitable for applications requiring high temperature resistance and inertness. The "622" indicator suggests specific regulatory or statistical tracking associated with this particular subclassification.

At this level of detail within the HTS, 7019.72.40.30 distinguishes itself from its sibling category, 7019.72.40.60, which is also designated as "Other" but presumably encompasses silica filament fabrics with a silica content of 93 percent or less, or other unspecified fabrics that do not meet the criteria for 7019.72.40.30. The key differentiator lies in the precise silica percentage of the filaments.

As this is a leaf node, there are no further subcategories. Therefore, classification within 7019.72.40.30 is definitive based on the material composition of the filaments. Importers and exporters should ensure they have accurate documentation confirming the silica content of the filaments used in the fabric to ensure correct customs declaration.