2pcs OPC drum unit compatible with iR2520, iR2525, iR2530, iR2535, iR2545, iR ADVANCE 4051, 4225, 4235, 4245, 4251, 4025, 4035, 4045.This cylinder is designed for use as a replacement component in laser printers.Each set includes two OPC drums for maintenance and repair purposes.The drum unit supports consistent image transfer during printing operations. This product is not affiliated with the manufacturer.Brand mentions are used for compatibility indication.