The Pole Wrap 4" inch Finishing Basement Column Cap Base Trim Set is a stainable oak wood onlay designed for interior use. Made of hardwood oak, this beam-shaped trim set features a 4 x 1 inch size with a 1/2 inch thickness. The brown color and untreated finish add a touch of natural elegance to any space. Ideal for basements or other interior areas, this trim set from Pole Wrap is a versatile and stylish addition to your home improvement project.