Nylon Sheave imapangidwa ndi nayiloni ya MC, yomwe imapangidwa makamaka ndi zinthu za caprolactam potenthetsa, kusungunuka, kuponyera ndi kuumba thermoplastic.Aluminium Wheel Rubber Coated ili ndi mphamvu zambiri, kulemera kwake, kukana kuvala komanso kukana dzimbiri.Kuthamanga kwa pulley ndi kwakukulu.