1,Diameter: 50-219mm 2,Idler Length:160mm-3500mm 3,Bearing Size:6204,6205,6305,6206,6306,6307,6308 4,Guranteen time:30000h 1,Diameter: 50-219mm 2,Idler Length:160mm-3500mm 3,Bearing Size:6204,6205,6305,6206,6306,6307,6308 4,Guranteen time:30000hDetailed conveyor roller idler feature: 1.Roller idlers Dia 60mm-219mm, length 150-3500mm, which are used in the steel industry, harbor,coal industry, ...