This is Walnut Character Unfinished Engineered, a premium flooring product made from Walnut offered by Knox Hardwood Flooring. Perfect for homes in Knoxville, TN, this Walnut flooring features Prominent natural color variations between the light-colored sapwood and the dark heartwood along with varying natural wood characters and sound knots. Will admit the following: Unlimited open knots and open characters not exceeding 1” in diameter that will fill readily. Unlimited pin worm holes, checks, heavy streaks, pith full length of piece. Sapwood allowance up to 20% of piece, sapwood may be stained, blotchy or speckled. The back side will admit: Occasional scant thickness and or waney edge if piece has sufficient bearing of full thickness to support it to the floor.. Our expert team ensures top-notch installation, elevating your space with the finest materials.