Markal Railroad Chalk | Box of 144 Available in 7 colors, Markal's Railroad chalk leaves clear and highly visible marks on a multitude of surfaces. Markal's Railroad Chalk is specially designed to leave temporary, smooth, bold and bright chalk marks in...

Markal UltraScan Fluorescent Lumber Grading Crayons Tested to meet specifications for the Lucidyne ColorScan and Newnes-McGehee Mark Readers! Markal UltraScan Grading Crayons can be used on wet and green lumber and provide the highest fluorescent...