This Package is DR420 Drum Unit, NOT Toner Cartridge. LxTek drum replacements for Brother DR420 DR-420 are strictly tested with industry quality control processes. Page Yield: Up to 24,000 pages per DR630 DR-630 drum unit at 5% coverage in accordance with ISO/IEC 19798 (Letter) * A4 is larger than Letter paper and therefore 5% will be more ink on the page on A4 vs letter. Package Contents: 2 Pack (2 Black) compatible for Brother DR420 DR-420 drum unit. Compatible Printers: DR-420 drum compatible with Brother DCP-7060D, DCP-7065D, HL-2130, HL-2132, HL-2220, HL-2230, HL-2240, HL-2240D, HL-2242D, HL-2250DN, HL-2270DW, HL-2280DW, Intellifax 2840, Intellifax 2940, MFC-7240, MFC-7360N, MFC-7365DN, MFC-7460DN, MFC-7860DW Laser Printer.