This offer includes a New Drum Unit. These cartridges are designed for use with Brother DCP-1200 1400 FAX-4750 5750 HL-1030 1230 MFC-8300 8500 8600 Intellifax 4100 4100e More printers. These cartridges are professionally manufactured to provide reliable performance and high-quality prints. Additionally, the use of these replacement toner cartridges does not void your printer's warranty. We also offer free and fast shipping on all domestic orders. If you are not completely satisfied with your purchase, you can return your order within 30 days for a full refund or free replacement.