6902.10.10.00 - Magnesite bricks

This HTS classification pertains to refractory bricks specifically composed of magnesite. These bricks are essential components in high-temperature industrial applications, serving as durable linings for furnaces, kilns, and other processing equipment. The key defining characteristic for this subcategory is that the refractory brick must contain, by weight, more than 50 percent of the elements magnesium, calcium, or chromium, expressed as MgO, CaO, or Cr2O3, with magnesite (MgO) being the primary component.

This classification is distinguished from its sibling, 6902.10.50.00, which covers "other" refractory bricks not meeting the specific chemical composition criteria of this magnesite category. While both fall under the broader umbrella of refractory ceramic constructional goods, this specific HTS code isolates those predominantly made from magnesite to ensure accurate tariff application based on material composition.

As this is a leaf node in the HTS classification, there are no further subcategories. Therefore, classification within 6902.10.10.00 is finalized once the product is identified as a refractory brick, block, tile, or similar constructional good, and it is confirmed to contain, singly or together, more than 50 percent of the specified oxides, with magnesite being the principal constituent.