The level of wood higher than the tongue and groove (the interlocking ridges and valleys on the sides with the plank) displays the thickness of your use layer, that will show you whether it's solid wood, prefinished or manufacturing facility-finished, or engineered. This means you’ve narrowed your floor option https://www.google.com/maps/search/Sequoia+Flooring+Inc/@34.1796774,-118.4558539,17z