This decorative keystone features a recessed panel. The back of the keystone easily interlocks with the moulding profile (MLD220). The keystone adds prominence and character to the moulding profile. Now you can easily define your trim with our versatile urethane keystones. The recessed keystone is precision-molded in high quality polyurethane materials. Rigid, high-density urethane is strong, but also lightweight and easy to work with. As with our urethane mouldings and trim products, the recessed keystone also performs exceptionally well in exterior applications, as it will not warp, crack, decay or peel. The recessed keystone is also factory-primed, so it can be immediately painted.