M-D Building Products 11882 M-D Flat Door Threshold, 1-3/4 in W X 36 in L X 5/16 in H, Tan/Oak, 1-3/4", Natural Natural wood provides an ideal thermal barrier Solid hardwood for beauty and durability Easily stained or painted to match floor or door trim Seals gaps up to 3/8 inch high 1-3/4-inches wide by 5/16-inch high by 36 inches long