... . 2.Length:190-3500mm . 3.Material: Iron, Rubber,HDPE, etc.idler for conveyorSpecifications1.Diameter:63-219mm . 2.Length:190-3500mm . 3 ... from 20 to 40mm Roller Conveyor Idler - tube material: carbon steel pipe, rubber, HDPE or UHMWPE- tube diameter: 63-219 mm - tube ... and water proofStandard DiameterLength Scope(mm)Bearings Type(Min-Max)Idler’s Shell Wall ThicknessmmInch63.52 1/2150-35002043.0mm-3 ...