... .: 24KGS CHALK:1. Passed EN71, ASTM D-4236 & REACH2. Non toxic, white color, assorted colors, colors can be adjusted3. High quality and ... bright color, clear marks, uneasy broken, with less dust, Suitable for teaching, leaning, road side pictures and other works.5. Packing ... . as well as the certain organizations of the United Nations for its fine quality and reasonable prices.