6907.22.10.05 - Tiles, whether or not rectangular, the largest surface area of which is capable of being enclosed in a square the side of which is less than 7 cm

This classification pertains to unglazed ceramic tiles, specifically those characterized by their absorption of water by weight, exceeding 0.5 percent but not exceeding 10 percent. These tiles are intended for various applications such as flooring, paving, and wall coverings. The defining characteristic for inclusion here is this specific range of water absorption, which indicates a porous ceramic body suitable for certain finishing processes or specific environmental conditions.

This category distinguishes itself from its sibling, "Other," which would encompass unglazed ceramic tiles not falling within the specified water absorption range, or those with unique characteristics not covered by the more granular subheadings. The defined water absorption coefficient is a critical technical parameter that differentiates these tiles from potentially denser or more porous ceramic tiling products.

As this is a leaf node in the HTS structure, there are no further subcategories to introduce. Therefore, the focus for classification within this specific code is on ensuring the goods meet the criteria of being unglazed ceramic tiles and that their water absorption coefficient by weight falls precisely within the range of greater than 0.5 percent and up to and including 10 percent. Examples include certain types of quarry tiles or unglazed floor tiles used in industrial settings or areas where moderate porosity is acceptable or desirable.