Iri ndiro mumvuri weziso rine mavara gumi. Gomba rayo remukati dhayamita 18 * 18mm, rinotaridzika sekhibhodi yekombuta. Inogadzirwa uchishandisa zvemhando yepamusoro AS zvinhu, zvine ruvara rwakajeka uye hunhu hwepamusoro. Iine ganda rakajeka uye diki diki uye yakawanda-ruvara ruvara inoenderana, ine chokwadi chekuva nyeredzi nyowani mumumvuri weziso.