Nylon Sheave e entsoe ka nylon ea MC, e entsoeng haholo ka thepa ea caprolactam ka ho futhumatsa, ho qhibiliha, ho lahla le ho bopa thermoplastic.Aluminium Wheel Rubber Coated e na le matla a phahameng, boima bo bobebe, ho hanyetsa ho roala le ho hanyetsa kutu.Boima ba ho hula ha pulley bo boholo.