... .Standard:DIN,CEMA,JIS,AS,ISO. 3.used in the steel industry, harbor, coal , power industry, etc. Name:General conveyor rollerMaterial ... :Carbon steel/stainless steelFeatures: (1)Tube:carbon steel tube S235JR/ seamless steel tube; (2)Shaft: 45# STEEL equal to C45, or ... welding technique ensure idler with low vibration and noise. Stainless Steel Belt Conveyor Idler