9902.15.53 - Vacuum pumps, each having a steel casing and outer shell of plastics to permit cooling; such pumps measuring approximately 22 cm in height and 16 cm in width, having an aperture to connect with a HEPA filter and a power output rating exceeding 850 W but not over 1050 W, valued no more than $24 each (provided for in subheading 8414.10.00)

This HTS category, 9902.15.53, covers specific types of vacuum pumps designed for specialized applications, notably those intended for use with HEPA filtration systems. The defining characteristics include a robust steel casing for durability and a plastic outer shell engineered for efficient cooling. Critically, these pumps are distinguished by their physical dimensions, typically around 22 cm in height and 16 cm in width, and a power output rating within the range of 850 W to 1050 W. Furthermore, a key stipulation for classification within this provision is a maximum value of $24 per unit. This specific tariff code is provided for under subheading 8414.10.00, indicating its relation to general air pumps and compressors.

As a temporary legislative provision within Chapter 99, this code offers a specialized classification for these particular vacuum pumps, separate from their primary classification under the machinery chapters of the HTS. Unlike the broad categories of live animals or other general machinery classifications that may appear as siblings at the root level of the HTS database, 9902.15.53 is highly specific, focusing on the precise technical and value attributes of the vacuum pumps. The "Section XXII: Special Classification Provisions" context signifies that this code is subject to temporary modifications or restrictions, often related to trade agreements or agricultural legislation, and thus may have different import duties or requirements than goods classified under more permanent HTS headings.

Since this is a leaf node, there are no further subdivisions. The detailed description provided for 9902.15.53 serves as the definitive criteria for classification. Importers must ensure that any vacuum pump being declared meets all specified physical, functional, and value requirements to be correctly classified under this provision. Failure to meet any of these precise specifications would necessitate classification under the more general provisions of the HTS, such as subheading 8414.10.00, without the benefit of this temporary tariff treatment.