Oak (Quercus spp.); thickness: - 5/8" w/2.0 mm natural wood veneer & 2.0 mm agglomerated cork layer; width - 4"; lengths- 11-3/16" to 47-1/4" (average approx. 40"); finish - scratch-resistant urethane, 25-year limited residential warranty; installation - floating (UNICLIC system); environmental - meets or exceeds California Dept. of Public Health Services (Section 01350) indoor air quality standards.