9902.14.73 - Catalytic converter needled blanket mats of ceramic fibers, containing over 65 percent by weight of aluminum oxide and 3 percent or more but less than 7 percent by weight of acrylic latex organic binder, measuring 10.0 mm or more in thickness, of a basis weight greater than or equal to 1745 g/m2; presented in bulk, sheets or rolls, designed for use in motor vehicles of heading 8703 (provided for in subheading 6806.10.00).

This HTS classification, 9902.14.73, covers a very specific type of catalytic converter insulating material. The goods are characterized by their construction from ceramic fibers, with a precise composition: over 65% aluminum oxide by weight, and an acrylic latex organic binder ranging from 3% to less than 7% by weight. Furthermore, these mats must meet stringent physical dimensions, including a thickness of 10.0 mm or greater and a basis weight of at least 1745 g/m². The intended use is critical: these materials are designed for incorporation into catalytic converters for motor vehicles classified under heading 8703. They are presented in bulk, sheets, or rolls for this purpose.

Distinguishing this category from its siblings is straightforward, as Chapter 99 of the HTS is reserved for temporary legislation, modifications, and special provisions. Unlike the general commodity chapters (01xx, 02xx, etc.) that define broad product categories, this chapter, and specifically subheading 9902.14.73, addresses a temporary measure related to specific imported goods. The general product classifications for catalytic converters or ceramic fibers would typically reside in other chapters, but this specific tariff code is used to implement a particular trade policy or restriction for these specialized mats.

As this is a leaf node, there are no further subcategories within HTS 9902.14.73. This signifies that the description provided fully defines the scope of this particular tariff provision. Any goods meeting all the specified material, dimensional, and intended use criteria will fall under this code. Importers must carefully verify each of these parameters, as the temporary nature of Chapter 99 provisions often means strict adherence to all defining characteristics is required for correct classification and compliance.