7019.61 - Closed woven fabrics of rovings:

HTS code 7019.61 specifically classifies closed woven fabrics manufactured from rovings. These fabrics are characterized by their construction where warp and weft yarns interlace to form a continuous, non-porous surface. The material composition is exclusively glass fibers, forming rovings that are then woven into fabric. This category excludes fabrics made from spun yarns, which fall under different subheadings.

This classification distinguishes itself from its siblings by its focus on *closed woven* structures derived from *rovings*. For instance, 7019.62, "Other closed fabrics of rovings," likely encompasses closed fabrics of rovings that are not necessarily woven, such as felted or bonded materials. Similarly, 7019.63 and 7019.64 address woven fabrics of *yarns* (as opposed to rovings) and further differentiate based on coating or lamination and weave pattern. Open woven fabrics, classified under 7019.65 and its subsequent sibling, are explicitly excluded due to their inherent porosity.

Within this category, further subdivisions exist to refine classification based on specific product characteristics. Subcategories such as "Of a width not exceeding 30 cm" and "Other" allow for detailed distinctions. These subdivisions are crucial for accurate tariff application, enabling customs authorities to differentiate between fabrics based on their dimensional attributes and any other qualifying features not captured by the primary "closed woven fabric of rovings" description.