The Brother DR360 drum unit works with the TN330 and TN360 toner cartridges (sold separately) to provide clean, sharp prints on your compatible Brother laser printers and multifunction units. You can expect an impressive life span of about 12,000 pages (based on 5% coverage) from this dedicated drum unit. It snaps easily into place with minimal fuss and is compatible with a wide variety of Brother models, including laser printer models HL-2140 and HL-2170w. The package includes one drum unit.