Solid cherry. Stock is from 50+year old slabs kept in hay loft in Ill. and have been in my wood rack in Seattle for the last 17 yrs. "Seasoned" with bat, pigeon, and raccoon guano and were twisted, cupped, split etc. ~2" thick, some were 16" wide X 8ft. long, most were 9" wide. Best guess is my fathers' sawyer buddy gave them to him because the were not good enough to mill and market to payin' customers!! Lots of machining but should have enough. Incredible deep color. I can attach top with slots for expansion and hopefully the Dominoed joints will have matching expansion as they will be solid glue joint. Thinking a tenon every 6 inches along 21" panels front to back. Is that too generous a number?? More the merrier? 'Tis the season.