Catalog:Boards & Accessories Crayola® Anti-Dust® Chalk Low-dust chalk for use on most chalkboards. Makes clean, smooth lines and erases easily. Great for classrooms. Color(s): White; Number of Colors: 1; Age Recommendation: N/A; Length: 3 3/16 in. Price : US$ 0.89 Quantity: copyright 2010 Lakeway Publishers, Inc.