Ivugururwa rishya ryumukungugu kandi rirwanya gusaza, kuramba hamwe nubushyuhe bwo hejuru, bikozwe na polyurethane, birwanya kwambara, bikabije, birinda amarira, imbaraga nyinshi kandi birwanya kwikuramo
Kurwanya kwangirika kwinshi, impanuka nini ya buffer hamwe ningaruka zimpeshyi, byongera umutekano wikinyabiziga cyose.