24 Boxes per carton MST: 39X23X28CM G.W.: 25KGS N.W.: 24KGS CHALK:1. Passed EN71, ASTM D-4236 & REACH2. Non toxic, white color, assorted colors, colors can be adjusted3. High quality and competitive price4. The chalks are shaped by the latest and advanced material prescription, So as a result of bright color, clear marks, uneasy broken, with less dust, Suitable for teaching, leaning, road side ...