roller idle for the conveyor: 1.Dia: 60-219mm 2.used in mining ,coaling ,plant power, agriculture 3. ... 60-219mm.length 190-3400mm,which are used in the steel industry,habor,coal industry, power industry,cement ... industry,etc.2.Tube:steel tube Q235,seamless steel tube3.Shaft : ... ,hot galvanized painting ,static spraying painting idel roller for the conveyor