Compounded rubber, unvulcanised, in primary forms or in plates, sheets or strip
Rubber, unvulcanised, compounded with carbon black or silica, in primary forms or in plates, sheets or strip
Compounded rubber, unvulcanised, in the form of solutions or dispersions (excl. rubber compounded with carbon black or silica, and mixtures of natural rubber, balata, guttapercha, guayule, chicle and similar natural gums containing synthetic rubber or factice derived from oils)