... DIN,CEMA,JIS,AS,ISO. 3.used in the steel industry, harbor, coal , power industry, etc. ... rollerMaterial:Carbon steel/stainless steelFeatures: (1)Tube:carbon steel tube S235JR/ seamless steel tube; (2)Shaft: 45# STEEL equal to ... C45, or as request (3)Bearing:Single&Double ... low vibration and noise. Stainless Steel Belt Conveyor Idler