4911.91.20.20 - Posters

This HTS category, 4911.91.20.20, specifically covers posters that are printed on paper or paperboard with a thickness not exceeding 0.51 mm. These are considered lithographs and are intended for display or decorative purposes, featuring images, designs, or photographs. The key classification criteria here are the printing method (lithographic process), the substrate material (paper or paperboard), and the physical dimension of the substrate's thickness.

This classification distinguishes itself from its sibling category, 4911.91.20.40, which encompasses "Other" printed matter at this level. While this "lithographs" category is also "Other printed matter, including printed pictures and photographs," it is specifically carved out for lithographically printed items meeting the thickness requirement, whereas the sibling category would cover other types of printed pictures and photographs not produced by lithography or those exceeding the specified thickness.

As this is a leaf node, there are no further subcategories. Therefore, classification within this code is definitive for posters meeting the outlined lithographic printing, paper/paperboard substrate, and thickness criteria. Importers should ensure that the printed item is indeed a lithograph and that the paper or paperboard substrate's thickness is precisely measured to fall within the 0.51 mm limit to ensure correct classification.