Irwin Strait-Line Orange Hi-Visibility Chalk Line Chalk, 8 oz. is specially designed for use with reel type chalkline boxes, making it a reliable choice for marking straight lines on a variety of surfaces. Packaged in a convenient plastic squeeze bottle with a fast fill spout, this chalk is for exterior applications on wood, drywall, concrete, stone, and metal. Its bright orange color enhances visibility, especially in low light conditions or on dark surfaces, ensuring accurate and clear markings every time. This chalk a permanence level of 2 on a scale of 0 to 4, balancing durability and ease of removal. I for professionals and DIY enthusiasts alike, it comes in an 8-ounce bottle for ample supply. Model Number: 64905ZR