... Roller/Idler:1, nylon rollers is with high wear resistance, low coefficient of friction, not easy to wear belts; 2, nylon ... rollers have good self-lubricating, no oiling, easy to use in adverse conditions;3 ... , light weight, easy installation, no maintenance; 7, nylon rollers has low noise (3-7DB),stable operation, long life (the life is 3 ...