Section 07 Plastics and articles thereof; rubber and articles thereof 39 Plastics and articles thereof 39 11 Petroleum resins, coumarone-indene resins, polyterpenes, polysulphides, polysulphones and other products specified in note 3 to this chapter, not elsewhere specified or included, in primary forms 39 11 20 Poly (1,3-phenylene methylphosphonate) Commodity Code Description 39 11 20 00 Poly (1,3-phenylene methylphosphonate)