... EASY INSTALL WOOD FLOORING/EASY INSTALLATION WOOD FLOORING/EASY CLICK LOCK WOOD FLOORING 1.TOPLAYER WOOD-BLACK AMERICAN WALNUT Black Walnut ... ) tall, 3 ft (1 m) trunk diameterAverage Dried Weight: 41 lbs/ft3 (655 kg/m3)Basic Specific Gravity: .51Hardness: 1,010 ... lbf (4,490 N)Rupture Strength: 14,600 lbf/in2 (100,700 kPa)Elastic Strength: 1,680,000 ...