Walnut Burr / Burl - REAL WOOD Sheet - 220mm x 185mm (8.6 x 7.2 inches)
Width: 185mm. Also known as Walnut Burl, Californian Walnut Burr. The burr is only a "by-product", the actual purpose of the tree is to grow nuts. To this end gigantic walnut plantations have been set up.