We can supply calcium sulphate moulded chalk and calcium carbonate extruded chalk with good price. The size of calcium sulphate chalk is diameter 10mm length 80mm or Diameter 8-10mm length 74mm. The packing is 100PCS/box, 48or50boxes/CTN. The size of calcium carbonate chalk is diameter 10mm length 80mm. The packing is 100PCS. /Box, 16box/CTN. We can also arrange the production of chalk according to customers requirements. All our chalks is dustless and non-toxic. Welcome to visit our facotory and learn more about our factory.