Conveyor roller Used in mining,cement,steel,harbor,etc. Standard:ISO,CEMA,DIN,JIS, etc Certificate:CE, ISO, BV, SGS, etc Detailed conveyor roller idler feature: 1.Roller idlers Dia 50mm-219mm, length 190-3400mm, which are used in the steel industry, harbor, coal industry, power industry, cement industry, etc2.Tube: carbon steel tube Q235/ seamless steel tube3.Shaft: 45# STEEL5.Bearing: Single & ...