... and exporter specializing in all kinds of high quality conveyor rollers. Our products are famous for : high efficiency, long ... system .With so many cherits,our rollers are widely used in mining, power plants,cement mills,salt plants, manufacturings,harbors, constructions ... Guanghuan high-frequency Welded Steel Tube ,special for Conveyor Rollers.3.Shaft: Bright Drawn Steel to required bearing tolerance, ...