Be very careful here -Read everything. We bought 35 meters of an engineered wood based on sample and brochure provided. On receipt opened one packet to check colour, top plank was fine, and left floorer to lay. The floor is riddled with brown filler and broken knots, after a fruitless 20 wait on the phone to CS. I went back to the sample with description on the back and brochure, no mention. Then back to website, not in description, but then if you download the full technical specs, there it was Filler "allowed" broken knots and cracks "allowed". I do do feel this was fully transparent as appeared hidden away. So be cautious here if you intend to use this company