7002.20.10.00 - Of fused quartz or other fused silica

HTS Code 7002.20.10.00 specifically classifies glass rods made from fused quartz or other fused silica. These materials are highly pure, exhibit excellent thermal shock resistance, and possess low thermal expansion properties, making them ideal for specialized industrial, scientific, and optical applications. Examples include rods used in the production of high-intensity lighting, quartz glass tubing for laboratory equipment, and components for optical instruments.

This category is distinguished from its sibling, 7002.20.50.00 ("Other"), by its exclusive focus on rods composed of fused quartz or fused silica. The sibling category encompasses glass rods made from other types of glass, such as soda-lime glass or borosilicate glass, which have different chemical compositions and physical properties. Therefore, the critical classification criterion here is the specific mineral composition of the glass.

As this is a leaf node within the HTS, there are no further subcategories. Classification under this code is definitive for unworked glass rods made solely from fused quartz or other fused silica. The absence of further subdivisions indicates that all such rods, regardless of diameter or length, fall under this single code, provided they meet the material requirement.