1604.18.10.00 - In airtight containers

This HTS category, 1604.18.10.00, specifically classifies shark fins that have been prepared or preserved and are packaged in airtight containers. This implies that the shark fins have undergone processes such as drying, salting, or canning to ensure preservation and extend shelf life. The defining characteristic of this subcategory is the method of packaging, which is crucial for maintaining product integrity and preventing spoilage.

This classification is distinct from its sibling category, 1604.18.90.00 "Other." The "Other" category would encompass shark fins prepared or preserved but not packaged in airtight containers. Therefore, the presence or absence of airtight packaging is the primary differentiator between these two sibling nodes.

As this is a leaf node, there are no further subcategories within 1604.18.10.00. All goods meeting the description of prepared or preserved shark fins packaged in airtight containers fall directly under this specific HTS code. Examples would include canned shark fins ready for culinary use or dried shark fins hermetically sealed for export.