2pcs JAPAN GPR-39 NPG-55 C-EXV37 IR1730 OPC DRUM FOR IR1730 1740 1750 iR ADVANCE 400 500 Replacement OPC drum unit compatible with specified models.Designed for use in laser printers and copiers.Set includes two units.Matches specifications for consistent performance.Install following device guidelines for proper. : This part is made by an independent vendor.Any brand/model mention is for compatibility purposes only.