4812.00.00.00 - Filter blocks, slabs and plates, of paper pulp

HTS Code 4812.00.00.00 specifically covers filter blocks, slabs, and plates manufactured from paper pulp. These items are designed for filtration purposes, leveraging the porous structure of paper pulp to trap impurities from liquids or gases. Examples include filter media used in various industrial, automotive, or domestic applications, such as oil filters, air filters, or water purification systems. The key defining characteristic is the material (paper pulp) and the form (blocks, slabs, or plates) intended for filtering.

This classification stands apart from its sibling categories, which encompass a broad range of products from live animals to various categories of machinery and chemicals. Unlike general paper and paperboard products covered in other chapters of Section X, 4812.00.00.00 is specific to formed paper pulp items with a direct filtering function. It is distinct from other paper-based articles that might serve a packaging, writing, or structural purpose.

As this is a leaf node within the HTS, there are no further subcategories under 4812.00.00.00. Therefore, the classification decision hinges entirely on whether the imported article meets the description of a filter block, slab, or plate made from paper pulp. Considerations for classification would include the physical form, the material composition, and the intended use as a filtration medium.