4006.90 - Other:

This HTS category, 4006.90, encompasses a broad range of other forms and articles manufactured from unvulcanized rubber, excluding specific items detailed elsewhere. This includes, but is not limited to, rods, tubes, profile shapes, discs, and rings made from rubber that has not undergone vulcanization. These items are typically used as components or raw materials in various industrial applications, as well as for specific aftermarket purposes.

Distinguishing this category from its sibling, 4006.10, is crucial. While 4006.10 specifically covers "Camel-back" strips intended for the retreading of rubber tires, category 4006.90 is more general and applies to all other unvulcanized rubber articles that do not fit the narrower description of tire retreading material. Therefore, any unvulcanized rubber article not designated for tire retreading falls under the scope of 4006.90.

The subcategories under 4006.90 provide further refinement based on the type of rubber used. Specifically, 4006.90.10.00 pertains to articles manufactured from natural unvulcanized rubber. In contrast, 4006.90.50.00 covers all other forms and articles of unvulcanized rubber that are not derived from natural rubber, effectively encompassing synthetic or blended rubber compositions.