mounting ring is manufactured spetsiaalsest nailonplastist. Shock- chemistry- and Weatherproof. before sobitusrõnga mounting control et wheel middle hole and wheel hub ratta tsentreerimise washer oleks clean rust and dirt. if necessary clean surfaces. before sobitusrõngaga ratta mounting car alla veendu et kasutad in right sizes fitting rings and this suitable for for wheel and for car!