Spacer for 6 x 48 inch delta or rockwell upper idler drum assembly. two required. all of these parts are available separately: cast bracket (406-03-014-0013 also 406-03-014-0001) bearings (920-04-010-7273) pivoting keys (406-03-071-0001) drum shaft (406-03-108-0001) jam nut for renovo idler shafts (902-01-201-2558r) pivot pin (905-01-010-5085) drum (406-03-362-0003) idler shaft retaining nut (old style for delta shafts) (902-07-020-7176). ã‚â