Subheadings 3
6809.11 Plaster, or plaster compositions; boards, sheets, panels, tiles and similar articles, faced or reinforced with paper or paperboard only, not ornamented 6809.19 Plaster, or plaster compositions; boards, sheets, panels, tiles and similar articles, (other than faced or reinforced with paper or paperboard only), not ornamented 6809.90 Plaster articles or articles of compositions based on plaster; n.e.c. in heading no. 6809