4411.93.60.00 - Not surface covered (except for oil treatment)

This HTS classification covers fiberboard of wood or other ligneous materials, specifically those that are not surface-covered (excluding those that have undergone oil treatment). These boards are manufactured by bonding wood fibers or other ligneous materials with resins or other organic substances. The key defining characteristic for inclusion here is the density of the board, which must fall between 0.5 g/cm³ and 0.8 g/cm³. Furthermore, these boards are not modified by any additional surface treatments beyond the basic manufacturing process or oil treatment.

Distinguishing this category from its sibling, 4411.93.90 (Other), is crucial. While both fall under the broader umbrella of "Other" fiberboard within a specific density range, this particular sub-heading is for those that have *not* undergone any surface covering. The sibling category would encompass fiberboards that, while meeting the density criteria, have been subjected to additional surface treatments not covered by the current node.

As this is a leaf node in the HTS, there are no further subcategories to introduce. Therefore, the classification hinges entirely on the absence of surface covering (other than oil treatment) and the specified density range. Examples of products that would fall here include unvarnished, unpainted, or unlaminated particleboard or fiberboard that meets the density requirements and has not been treated with oil.