Hickory (Carya spp.), relative hardness - 1820, thickness: - 1/2", width - 5", lengths- 16-48", finish - Handscraped, finished with PPG and aluminium oxide coating. 35-year limited residential warranty, installation - nail, staple or glue-down (T&G Antique Perspective Collection) or floating, drop lock installation with Click system (Evolution North American Collection). Environmental - FloorScore certified and CARB Phase II compliant.