Mercier 6.5" Atmosphere Authentic Engineered Hickory 12mm Hardwood PlankMercier Atmosphere 6. 5" Authentic Engineered Hickory 12mm Hardwood Plank features wide 6. 5" planks with a matte finish highlighting hickory's grain and character. The engineered 12mm thickness supports diverse subfloors and radiant heat, complemented by a sustainable, low VOC finish that promotes indoor air quality. This plank adds warmth and organic feel to both contemporary and traditional homes while being easy to maintain.