Chapter 68 — Articles of stone, plaster, cement, asbestos, mica or similar materials

Heading 6804 — Millstones, grindstones, grinding wheels and the like, without frameworks, for grinding, sharpening, polishing, trueing or cutting, hand sharpening or polishing stones, and parts thereof, of natural stone, of agglomerated natural or artificial abrasives, or of ceramics, with or without parts of other materials.

Subheading 6804.10 — Millstones and grindstones for milling, grinding or pulping