5404 - Synthetic monofilament of 67 decitex or more and of which no cross-sectional dimension exceeds 1 mm; strip and the like (for example, artificial straw) of synthetic textile materials of an apparent width not exceeding 5 mm:

HTS Code 5404 encompasses synthetic monofilaments that are relatively thick, with a decitex of 67 or more and a cross-sectional dimension not exceeding 1 millimeter. It also includes synthetic textile strips and similar materials, such as artificial straw, with an apparent width of 5 millimeters or less. These are manufactured goods primarily designed for further processing into textiles or other industrial applications.

This category is distinct from other Chapters within Section XI, particularly those dealing with yarns (Chapter 50-56) or woven fabrics (Chapter 50-63). Unlike continuous filament yarns that are typically spun from multiple filaments, 5404 specifically addresses single, solid strands meeting the decitex and dimensional criteria. It also differentiates from flat woven or non-woven materials, as the products here are linear or strip-like in form.

Within HTS Code 5404, subcategories further refine the classification. The primary distinction is between monofilament, referring to the single-strand form, and "Other," which captures materials like artificial straw that, while synthetic and strip-like, may not be precisely defined as monofilament. This subdivision allows for precise accounting and duty assessment based on the specific form and intended use of these synthetic linear materials.