Kora kugirango ukoreshe ibyuma, plastike, ibiti, hamwe n'akuma.Uburebure bwose: mm 225.Birakwiye gukata ibikoresho byibyuma (2-8mm).Birakwiriye gukata ibiti by'imisumari, ikarito (10-100mm), plastiki (5-175mm), fiberglass ya plastike ikomeza (8-50mm).Gukata neza ibyuma.