Nearly pure, 95% calcium carbonate is free of all materials that could scratch, streak or pit your board surface. Special mineral cohesion agents ensure clean, dust-free use. Standard cylindrical design fits most chalk holde...

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Nearly pure, 95% calcium carbonate is free of all materials that could scratch, streak or pit your board surface. Special mineral cohesion agents ensure clean, dust-free use. Standard cylindrical design fits most chalk holders. School-approved, nontoxic. Color(s): Assorted; Number of Colors: 6; Age Recommendation: Ages 5 and Up; Length: 3 1/4".

  • Nearly pure calcium carbonate.
  • Clean and dust-free.
  • Standard cylindrical design.
  • School-approved, nontoxic.
  • Nearly pure calcium carbonate.
  • Clean and dust-free.
  • Standard cylindrical design.
  • School-approved, nontoxic.

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