7004.20.20 - In rectangular shape

This HTS category, 7004.20.20, specifically designates drawn or blown glass sheets that are rectangular in shape. This glass has undergone a coloring process throughout its mass, is opacified, flashed, or possesses a surface treatment that makes it absorbent, reflective, or non-reflecting. Crucially, the glass at this level has not been otherwise worked beyond these initial treatments and shaping into a rectangular form.

Within the broader classification of "Glass, colored throughout the mass (body tinted), opacified, flashed or having an absorbent, reflecting or non-reflecting layer," this category is distinguished by its "Other" sub-classification. The sibling category, 7004.20.50.00, also falls under this "Other" heading but represents a distinct grouping not further specified by thickness. The purpose of separating 7004.20.20.xx is to allow for a more granular classification based on a key physical attribute.

This category is further divided based on the thickness of the glass sheet. The subcategories, 7004.20.20.10 and 7004.20.20.20, differentiate between glass measuring less than 5 millimeters in thickness and those measuring 5 millimeters and over, respectively. This distinction is a critical factor in determining the appropriate classification and is often related to the intended end-use or manufacturing process of the glass.