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