Diameter ntoya, kuva kuri 75mm kugeza kuri 225mm, electrode yacu ya grafite yashizweho kugirango ihuze ibyifuzo byinganda nko gushonga kariside ya calcium, gushonga karubone, gutunganya corundum yera, ibyuma bidasanzwe bishonga, hamwe ninganda za Ferrosilicon zikenera inganda.