3921.90.40 - Flexible

This HTS category, 3921.90.40, specifically covers other plates, sheets, film, foil, and strip of plastics that are characterized by their flexibility. This broad designation encompasses a wide range of non-rigid plastic materials in various forms, excluding those that are explicitly defined or classified under more specific subheadings within Chapter 39. The "flexible" attribute is the primary distinguishing characteristic for items falling under this code.

At this level of detail, the distinction from sibling category 3921.90.50, also labeled "Other," lies in the inherent flexibility of the plastic product. While 3921.90.50 would capture any remaining "other" plates, sheets, film, foil, and strip of plastics not specifically classified elsewhere, 3921.90.40 narrows this scope to only those that possess significant pliability and can be bent or deformed without breaking. This differentiation is crucial for accurate customs processing.

This flexible material is further subdivided to provide more granular classification. Subcategory 3921.90.40.10 is designated for those flexible plates, sheets, film, foil, and strip of plastics that have been reinforced with paper. The remaining flexible products within this category, which do not meet the criteria for paper reinforcement, are classified under 3921.90.40.90 as "Other." This subdivision allows for the precise identification of reinforced versus non-reinforced flexible plastic sheeting.