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. Round stick 3-1/4" x 3/8" fits most chalk chucks. Includes 12 sticks in assorted colors per pack. AP certified non-toxic.

• 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
• Made from 95% pure calcium carbonate
• Round stick measures 3-1/4" x 3/8"
• Smooth on boards
• Easily removed
• Pack of 12 in assorted colors