9902.15.11 - Sintered tungsten bars containing 99.95 percent or more by weight of tungsten, in 0.004 mm (4 micron) size, each measuring 49.78 cm to 64.14 cm in length, 19.56 cm to 23.5 cm in width and 3.99 cm to 4.11 cm in thickness (provided for in subheading 8101.94.00)

This HTS category, 9902.15.11, specifically covers sintered tungsten bars characterized by extremely high tungsten content (99.95% or more by weight). The precise physical dimensions are crucial for classification within this subheading, with specific ranges provided for length (49.78 cm to 64.14 cm), width (19.56 cm to 23.5 cm), and thickness (3.99 cm to 4.11 cm). Furthermore, the particle size of the sintered tungsten, at 0.004 mm (4 micron), is a defining characteristic. This category falls under temporary legislation and modifications, indicating that its application is not permanent and may be subject to change based on trade agreements or other policy adjustments.

While the broader HTS system classifies materials like tungsten under Chapter 81, this specific subheading within Chapter 99 serves a specialized purpose. It is designed to track and potentially regulate imports of these particular tungsten bars, which are explicitly stated to be provided for under subheading 8101.94.00. The existence of a Chapter 99 code alongside the material-specific classification suggests potential temporary import restrictions, quotas, or specific tariff treatments that are not part of the standard permanent tariff schedule. Therefore, this category distinguishes itself by its temporary nature and its role in managing specific trade flows of this high-purity, precisely dimensioned tungsten product.

As a leaf node, HTS category 9902.15.11 does not have subcategories. The detailed specifications for tungsten content, particle size, and exact dimensions within this node are intended to be definitive for classification purposes. Any deviation from these parameters would necessitate re-evaluation under a different HTS classification. The emphasis on these exact measurements and material composition highlights the granular level of detail required for accurate customs declarations under this temporary provision.