3918.10.10.20 - Vinyl tile consisting of a rigid solid polymer core

This HTS category, 3918.10.10.20, specifically covers vinyl tiles designed for flooring applications that are characterized by a rigid solid polymer core. These tiles are constructed using polymers of vinyl chloride and are intended for use as floor coverings. The defining feature here is the "rigid solid polymer core," which differentiates these tiles from other vinyl floor coverings with different core structures.

Distinction from sibling categories is crucial for accurate classification. While sibling 3918.10.10.30 also covers vinyl tiles, it is specifically for those with a rigid *expanded* polymer core, implying a cellular or foamed structure. The "Other" sibling category (3918.10.10.40) would encompass any remaining vinyl tiles that do not fit the specific descriptions of the solid or expanded core variants. Therefore, the presence of a non-expanded, solid polymer core is the primary classification criterion for this sub-heading.

As this is a leaf node in the HTS structure, there are no further subcategories for this specific classification. Classification is complete at this level, with the defining characteristic being the composition and core structure of the vinyl floor tile made from vinyl chloride polymers.