This superior chalk is 95% pure calcium carbonate and is free of foreign materials that work their way into the board surface causing scratching, streaking and pitting. Round stick 3-1/4″ x 3/8″ fits many chalk chucks. Available in white, yellow, and assorted colors.
Round Construction, Assortment of Colors
Made from 95 percent pure calcium carbonate
Smooth on boards
Safe for the classroom