4010.36.90.00 - Other

This HTS category, 4010.36.90.00, pertains to endless synchronous transmission belts made from vulcanized rubber, specifically those with an outside circumference exceeding 150 cm but not exceeding 198 cm. Synchronous belts are characterized by their toothed design, which engages with corresponding pulleys, ensuring precise timing and eliminating slippage, crucial for applications requiring synchronized power transmission. The specified circumference range is a key determinant for classification within this sub-heading.

This classification differentiates itself from its sibling category, "Combined with textile materials," by exclusively encompassing endless synchronous belts that are *solely* composed of vulcanized rubber, without any integrated textile reinforcements or components. While the broader chapter 40 covers various rubber articles, and the heading 4010 deals with conveyor or transmission belts, this specific sub-heading narrows the focus to the material composition (pure vulcanized rubber) and dimensional attributes (circumference) of synchronous transmission belts.

As a leaf node in the HTS structure, there are no further subcategories under 4010.36.90.00. Therefore, the classification is final at this level, determined by the precise circumference falling within the 150 cm to 198 cm range and the absence of textile materials. When classifying items under this code, professionals should confirm the belt's synchronous (toothed) design, its construction from vulcanized rubber only, and meticulously measure its outside circumference to ensure it meets the specified dimensional criteria.