Hygieia Dustless Board Chalk, 3 1/4 X 3/8. White, 12/box
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): White
Number of Colors: 1 Age Recommendation: Ages 5 and Up Length: 3 1/4''.