Sometimes it's labeled Birch plywood. (Not Baltic Birch, just Birch ply) Sometimes labeled underlayment. I find mine in the areas where Poplar and Oak is found in various lengths. 1/4" Baltic Birch is 4 or 5 ply. The 3/16" is 3 ply. Even so it cuts nicely, using a #1 Pegas MG blade I found little tear out on back and finishes well. Results for others may vary.