roller idle for the conveyor: 1.Dia: 60-219mm 2.used in mining ,coaling ,plant power, agriculture 3.pipe material : steel Detailed conveyor roller idler ... future: 1.Roller idlers: dia 60-219mm.length 190-3400mm,which are used in the steel industry,habor,coal industry, power industry ... 7.Painting : ordinary painting ,hot galvanized painting ,static spraying painting roller idel for the conveyor