... coefficient Dust- and water-proof Good acid and alkali resist Flat RollerConveyor rollers(idlers) are important parts on Belt Conveyor, ... ,380,455,465,525,530,600,700,750,790,800,950,1150,1400,1600204 205 305 306133305,375,380, ... 455,465,525,530,600,670,700,750,790,800,900,950,1000,1100,1150,1400,1600,1800,2000, ... ,380,455,465,525,530,600,700,750,790,800,900,1000,1050,1100,1120,1150,1250,1400,1500, ...