4010.36.30.00 - With textile components in which vegetable fibers predominate by weight over any other single textile fiber

This HTS category, 4010.36.30.00, specifically classifies endless synchronous belts designed for power transmission. These belts are characterized by an outside circumference ranging from over 150 cm up to and including 198 cm. Crucially, this classification applies when the belts are combined with textile materials, and within these textile components, vegetable fibers must predominate by weight over any other single type of textile fiber. Examples include timing belts used in industrial machinery or automotive applications where the reinforcement fabric is primarily derived from natural sources like cotton or linen.

The primary distinction for this category lies in the composition of its textile reinforcement. It differentiates itself from the sibling category, 4010.36.50.00, which covers "Other" combined textile belts of similar dimensions. Furthermore, it is distinct from another sibling category that covers belts where man-made fibers predominate by weight. This focus on the *predominant vegetable fiber content* is the key criterion for classification under 4010.36.30.00.

As this is a leaf node within the HTS, there are no further subcategories. Classification decisions at this level will therefore focus on meticulously examining the textile components to ensure that vegetable fibers indeed outweigh any other single fiber type, alongside verifying the dimensions and synchronous nature of the endless rubber belt.