0511.99.33.00 - Horsehair and horsehair waste, whether or not put up as a layer with or without supporting material

This classification, HTS Code 0511.99.33.00, specifically covers horsehair and waste derived from horsehair. This includes raw horsehair, processed horsehair, and any remnants or waste material generated from horsehair production. The key characteristic is that the material originates from horses and is in a form suitable for non-human consumption purposes. The phrase "whether or not put up as a layer with or without supporting material" indicates that the horsehair can be presented in various forms, such as mats, pads, or other assembled structures, as long as horsehair is the primary component.

Distinguishing this category from its siblings is crucial for accurate classification. HTS 0511.99.20.00 pertains to waste from raw hides and skins, and glue stock, which are distinct from hair products. HTS 0511.99.30 covers products specifically intended for animal feed or as ingredients in such food, a different end-use than the general applications of horsehair. HTS 0511.99.36.00 refers to natural sponges of animal origin, a completely different biological material. Finally, HTS 0511.99.40 acts as a residual "catch-all" for other animal products not elsewhere specified within Chapter 5.

As this is a leaf node within the HTS structure, there are no further subdivisions (subcategories) under 0511.99.33.00. Therefore, classification at this level relies on a direct match of the product's characteristics to the defined description. Practical considerations for classification under this code include verifying the animal origin (horse), the material itself (hair), and its intended use (not for human consumption and not specifically for animal feed). The physical form, including whether it is a loose material or assembled into a layer with or without support, is also relevant.