HYGIEIA DUSTLESS BOARD CHALK, 3 1/4 X 0.38. ASSORTED, 12/BOX
Dustless chalk in assorted colors is 95 percent pure calcium carbonate and free of foreign materials that can cause scratching, streaking and pitting on board surfaces. 3/8" diameter sticks fit many chalk chucks. Certified AP nontoxic chalk is recommended for ages 5 and up.