Section 07 Plastics and articles thereof; rubber and articles thereof 39 Plastics and articles thereof 39 07 Polyethers and epoxide resins; polyesters, in primary forms 39 07 20 Polytetramethylene ether glycol 39 07 20 10 Polytetramethylene ether glycol Commodity Code Description 39 07 20 10 00 Polytetramethylene ether glycol
