Section 07 Plastics and articles thereof; rubber and articles thereof 40 Rubber and articles thereof 40 01 Natural rubber... and similar gums, in primary forms or in plates, etc 40 01 21 Smoked sheets of natural rubber Commodity Code Description 40 01 21 00 Smoked sheets of natural rubber 40 01 21 10 RSS Grade 1 40 01 21 20 RSS Grade 2 40 01 21 30 RSS Grade 3 40 01 21 40 RSS Grade 4 40 01 21 50 RSS Grade 5 40 01 21 90 Other
