M-D Building Products 11874 72-Inch Hardwood Low Threshold, L x 3-1/2" W x 3/4" H, Unfinished Fits doors up to 72-Inch wide and seals gaps up to 3/4-Inch high between bottom of door and floor Low thermal transfer coefficient of wood helps save energy Solid hardwood for beauty and durability Natural wood provides an ideal thermal barrier Easily stained or painted to match floor or door trim