THE CHUMASH IS PART OF THE "SISTERS COLLECTION". IT IS MADE OF WALNUT AND O.S.B. (oriented strand board, which is typically used for sheathing of houses, and roofs), WHEN THE O.S.B. IS LAMINATED ON EDGE, AND PRESSED IT IS GIVEN THE LOOK OF CORK, OR A SIMILAR ORGANIC MATERIAL. LIKE THE OTHER PIECES IN THE "SISTERS COLLECTION" IS HAS MANY OPTIONS.