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 40 01 22 - - Technically specified natural rubber (TSNR) Commodity Code Description 40 01 22 00 - - Technically specified natural rubber (TSNR)