Markal Timberstik®+ Pro Grade Lumber Crayon – Blue The Markal Timberstik®+ Pro Grade Lumber Crayon in blue offers clear, consistent marking for layout and identification tasks. Suitable for multiple surfaces, it performs well across a range of environmental conditions. Key Features • Blue marking for clear visibility on varied surfaces • Suitable for wood, concrete, metal, and stone • Strong crayon design for durability in the field • Performs in wet, dry, and cold conditions