4001.22.00.25 - Grade 20

This HTS category, 4001.22.00.25, specifically classifies "Grade 20" technically specified natural rubber (TSNR). TSNR, as a broader category, refers to natural rubber that has been processed and characterized to meet precise technical specifications, often related to its viscosity, purity, and other physical properties, thereby ensuring consistent performance in manufacturing applications. Unlike general-purpose natural rubber, TSNR is engineered for greater predictability and reliability in downstream processes.

Within the "Technically Specified Natural Rubber (TSNR)" classification, "Grade 20" is distinguished by its particular set of technical characteristics, as defined by industry standards or the manufacturer. It differs from sibling categories such as Grade 5, Grade CV, and Grade 10 based on variations in these specific technical parameters. For example, the numerical designations often correspond to differences in Mooney viscosity or other performance-related metrics, which dictate the suitability of the rubber for different end-uses. "Grade 20" signifies a specific tier within this spectrum of technically controlled natural rubber grades.

As this HTS code represents a leaf node, there are no further subcategories under 4001.22.00.25. Therefore, classification at this level is final, and the importer or exporter must ensure that the natural rubber in question precisely meets the technical specifications designated as "Grade 20" to utilize this tariff line.