The Birch Series Cajons from Kopf Percussion offer percussionists a professional level cajon at a very reasonable price. The shells of these drums are crafted from thick 3/4" Baltic Birch. The dual playing surfaces are crafted from the best Baltic Birch 1/8" ply available. The corners are rounded for comfort and comes with an upholstered vinyl seat. These cajons are definitely "top shelf".