Nylon Sheave ikozwe muri MC nylon, ikozwe cyane cyane muri caprolactam ibikoresho byo gushyushya, gushonga, guta no kubumba thermoplastique.Aluminum Wheel Rubber Coated ifite imbaraga nyinshi, uburemere bworoshye, kwambara no kurwanya ruswa.Umutwaro wo gukurura pulley ni munini.