4418.91 - Of bamboo:

This HTS category, 4418.91, specifically encompasses builders' joinery and carpentry articles that are manufactured from bamboo. This includes a wide array of finished or semi-finished wooden components used in the construction of buildings and other structures. Examples within this classification can range from decorative bamboo trim and paneling to more functional items like bamboo-based shelving or structural elements, provided they meet the criteria for builders' joinery or carpentry.

Distinguishing this category from its direct siblings, 4418.92.00.00 covers specifically cellular wood panels. In contrast, 4418.91.00.00 is not limited to cellular structures but applies to a broader spectrum of bamboo joinery and carpentry, as long as the material is bamboo. The sibling category 4418.99.00.00 represents "Other" builders' joinery and carpentry not otherwise specified, which would exclude bamboo articles that fit within the defined scope of 4418.91.

Within the 4418.91 classification, further subdivisions exist to refine the classification of bamboo builders' joinery and carpentry. The subcategory 4418.91.10.00 is designated for drilled or notched lumber studs made from bamboo, highlighting a specific type of structural component. The remaining items fall under the residual subcategory 4418.91.91.00, intended for all other bamboo joinery and carpentry articles not specifically detailed in the preceding subcategory.