The Brother DR-1020 is a drum unit (not a toner cartridge) designed for use in certain Brother laser printers. It is part of the drum and toner system, where the drum unit works together with the toner cartridge to transfer the image onto the paper.

Here are some key details about the Brother DR-1020 drum unit:

1. Compatibility: The DR-1020 is compatible with various Brother printers, including:

   • Brother HL-1210W
   • Brother DCP-1510
   • Brother MFC-1810
   • Brother HL-1110

2. Function: The DR-1020 is responsible for the actual image formation on the paper. It holds the toner powder and transfers it onto the paper when combined with the toner cartridge (such as Brother TN-1030 or TN-1070).

3. Page Yield: The DR-1020 has an approximate yield of 12,000 pages (under standard testing conditions). This yield depends on factors like print density, frequency of use, and the type of documents printed.

4. Replacement: Drum units like the DR-1020 usually need to be replaced after a certain number of prints, as they wear out over time. It is recommended to replace the drum unit when the printer prompts you to do so, which may occur when the print quality starts to degrade (e.g., blurred or streaky prints).

To replace the DR-1020 drum unit, you would typically remove the old drum from the printer, install the new one, and reset the drum counter (if necessary) using the printer’s settings.

If you were looking for a toner cartridge instead of the drum, you would need a compatible cartridge like the Brother TN-1030 or TN-1070, which works with the same printer models.