Price Unit : GBP per Square meter. American Black Walnut Herringbone Engineered flooring is the epitome of luxury, bringing a rich and sophisticated look to any room. Its deep brown tones, punctuated by swirling grain patterns and natural knots, create an atmosphere of warmth and refinement. The UV lacquered finish not only enhances the walnut’s naturally beautiful colours but also adds a delicate sheen that gives the wood a polished, upscale appearance.