4411.14.10.00 - Not mechanically worked or surface covered

This HTS classification, 4411.14.10.00, specifically covers medium density fiberboard (MDF) that has a thickness exceeding 9 millimeters and has not been mechanically worked or surface covered. MDF itself is manufactured from wood fibers, bonded together with resins or other organic binders, and compressed to achieve a uniform density. The key differentiating factor for this subcategory is the thickness threshold, indicating a product with more substantial structural integrity compared to thinner boards.

The "Not mechanically worked or surface covered" designation is crucial, distinguishing these boards from finished or semi-finished wood products. This means the fiberboard is in its raw or basic form, without lamination, veneering, painting, grooving, or other surface treatments. Siblings at this level, such as "Other" (referring to fiberboard not meeting the specific criteria for MDF or thickness), would encompass a broader range of wood-based panel products.

As this is a leaf node within the HTS, there are no further subcategories under 4411.14.10.00. Therefore, classification at this level signifies a definitive category for this specific type of raw, thick medium density fiberboard. Importers and exporters should ensure the physical characteristics of their product precisely match these criteria, particularly regarding the thickness and the absence of any surface modifications, to ensure accurate classification for customs purposes.