Here is our 8″ Engineered Brazilian Walnut Hardwood flooring category. Each piece has Tongue and Groove milling on the ends and sides for a secure fit during installation. This standard Wear Layer for Engineered wood is a 2mm Wear Layer. For this Unfinished Clear Grade wood we offer a very thick 4mm Wear layer. This 5/8″ thick flooring delivers in a variety of standard and extra long length options.