For a sleek, clean look, the Masonite Smooth Flush Hardwood Hollow Core Birch Veneer Composite Interior Door Slab offers an affordable option perfect for home and office. As part of the Masonite commitment to environmental excellence, door facings are made with by-product wood chips and constructed using premium wood veneers. To customize to your decor, doors are ready to paint, varnish or stain.