What's the difference between a toner cartridge and a drum unit?

Most of the Brother printers and some HP printers need two types of printing consumables: toner cartridge and drum unit. What's the difference between them? And how to use them? This video will show you the details.

v4ink Brother DR 730 & TN 760 (Replaces TN 730) Compatible High Yield 3-Piece Combo Pack (Design V3) - 1 Drum + 2 Toners
https://www.v4ink.com/Brother-DR730-C...

v4ink Brother DR630 & TN660 (Replaces TN630) Compatible High Yield 4-Piece Combo Pack (Design V3) - 1 Drum + 3 Toners
https://www.v4ink.com/Brother-TN660-D...


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