... ,1120 310 Technical Data: Tube material: carbon steel Tube diameter: 89 to 219mm Tube thickness: ... 1)Steady running, reliable quality and reduce maintenance;2)Less movement longitudinally, rotating smoothly, extends the ... dirt and water immersed;5) Manufacturing by steel pipe specially for of high precision roller, ... Chinese chip coveyor idlers roller frame, galvanized steel frame, idlers brackets