1,Diameter: 60-219mm 2,Idler Length:160mm-3500mm 3,Bearing Size:6204,6205,6305,6206,6306,6307,6308 ... 4,Guranteen Time:30000h Name: conveyor roller idler Feature: ... .Tube: Q2353.Shaft: 45# STEEL4.Bearing: Single & Double Row Deep Groove Ball Bearing 2RZ&2Z with C3/C4 clearance.5 ... , power industry, cement industry, harbor, metallurgy. general idler