Irwin Strait-Line Marking Chalk

Chalks Writing & Correction IRWIN SAL65106 Marking Chalk, 5 lb, Fluorescent Green, Office Supplies > Writing & Correction > Chalks Writing & Correction High visibility chalk for self chalking line reels. For use on a variety of surfaces including wood, drywall, concrete, stone, and metal. Permanent colors, especially black and red, produce long lasting lines that won’t fade. For non-permanent lines use white or blue color. Fluorescent colors for low visibility applications.