Bellawood Prefinished Solid Wood Gunstock Oak 1in. Thick x 1.88in. Wide x 14.75in. Length Retrofit Return End, $12.99 USD/Box, LL Flooring (Lumber Liquidators)

The stair tread return, also known as nosing, is a finished edge extending beyond the riser. If needed, it can extend over the side or sides of the staircase if they are away from a wall. Measures 1 inch thick by 1.88 inches wide by 14.75 inches long.