5 lb. Strait-Line® Permanent Staining Marking Chalk, Midnight Black | IRW-2032160

Irwin's 5 lb. Black Strait-Line Permanent Marking Chalk is strong enough to hold up under the toughest conditions remaining visible after weeks of weather exposure and job site wear and tear. The highly visible Red chalk line gives confidence to any contractor. This chalk is made from a proprietary formulation for the highest performance results.

• Exterior use
• Visible after weeks of weather exposure and jobsite wear
• Provides greater visibility in standard lighting conditions
• Durable formula is weather-resistant and suitable for interior or exterior use
• Color: black