Section 07 Plastics and articles thereof; rubber and articles thereof 40 Rubber and articles thereof 40 01 Natural rubber, balata, gutta-percha, guayule, chicle and similar natural gums, in primary forms or in plates, sheets or strip. Commodity Code Description 40 01 10 Natural rubber latex, in primary forms or in plates, sheets or strip 40 01 21 Smoked sheets 40 01 22 Technically specified natural rubber, in primary forms or in plates, etc 40 01 29 Other 40 01 30 Balata, gutta-percha... and similar gums, in primary forms or in plates