This superior chalk is 95% pure calcium carbonate and free of foreign materials that work their way into the board surface causing scratching, streaking and pitting. AP certified non-toxic. Round stick 3-1/4" x 3/8" fits most chalk chucks. Includes 12 sticks in assorted colors per pack. Sold as 24 packs for a total of 288 chalk sticks.

• Made from 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 measures 3-1/4" x 3/8"
• Smooth on boards
• Assorted colors