... steel industry, harbor, coal industry, power industry, cement industry, Nylon Roller/Idler:1, nylon rollers is with high wear resistance, low ... self-lubricating, no oiling, easy to use in adverse conditions;3, nylon rollers is with the anti-static, anti-smoldering resistance ... 7, nylon rollers has low noise (3-7DB),stable operation, long life (the life is 3-5 times of metal roller) Nylon Roller/Idler: