6902.90.10 - Bricks

This category encompasses refractory bricks and similar constructional articles that are not primarily composed of siliceous fossil meals or similar siliceous earths. These are ceramic products designed to withstand high temperatures and are used in applications where thermal insulation or resistance to extreme heat is critical, such as in furnaces, kilns, and incinerators. The term "bricks" here refers to molded and fired units, and the scope extends to blocks, tiles, and analogous items sharing these refractory characteristics.

Distinguishing this category from its sibling, 6902.90.50 (Other), is crucial for accurate classification. While both fall under the broader classification of refractory ceramic constructional goods other than those of siliceous fossil meals, the "Other" category at 6902.90.50 would likely capture refractory ceramic constructional goods that do not fit into the more specific sub-classifications or further defined categories within the broader Heading 6902. Therefore, 6902.90.10 specifically targets refractory ceramic constructional goods that are not made from siliceous fossil meals or similar earths and are not otherwise classified under the "Other" designation.

Within this classification, further distinctions are made to refine the type of refractory brick. The subcategories differentiate based on the primary material composition. 6902.90.10.10 specifically covers refractory bricks and similar articles where clay is the principal constituent material. Conversely, 6902.90.10.20 is designated for all other refractory bricks and constructional goods within this group that do not primarily consist of clay, allowing for a more granular classification based on alternative refractory materials.