... . 2 effective sealing system. 3 high ability of anti-friction. Waterproof Top Quality Conveyor Roller Group Parameters: Diameter (mm)7689108108Thickness ... that it bears is more than 70%,therefore the quality of it is particularly important.It is widely used ... industry,iron and steel,cement,smelting,power,chemistry,construction material,port activities,etc.Features:1 Stable running,good quality,free ...