Markal Timberstik®+ Pro Grade Lumber Crayon – Black The Markal Timberstik®+ Pro Grade Lumber Crayon in black is designed for bold, highly visible marking on rough surfaces. Ideal for lumber, concrete, and masonry, it delivers consistent performance in a wide range of jobsite conditions. Key Features • Black marking for strong contrast on light surfaces • Suitable for wood, concrete, stone, and other rough materials • Durable crayon resists breakage in field use • Performs reliably in wet, dry, and cold conditions