Section 07 Plastics and articles thereof; rubber and articles thereof 39 Plastics and articles thereof 39 14 Ion-exchangers based on polymers of 39.01 to 39.13, in primary forms 39 14 00 Ion-exchangers based on polymers of heading 39.01 ti 39.13,in primary forms Commodity Code Description 39 14 00 00 Ion-exchangers based on polymers of heading 39.01 ti 39.13,in primary forms