American Black Walnut Elegant, Cracked & Natural Oiled 1860mm x 189mm x 20mm. Walnut wood flooring is one of the most luxurious products on the market, and this one is further up-scaled with soft hand-finished edges and open cracks to add character and charm to this richly warm floor. 6mm Top layer veneer allows for opium future sandings. Oil finish enhances the warm tones in walnut flooring and adds to the authentic look. Suitable for use in all areas and over flooring with underfloor heating.