GREENCYCLE DR221 4-colour drum unit set 15000 pages

Four-colour drum set for Brother laser printers

This set contains one black, one cyan, one magenta and one yellow drum unit, each rated for 15000 pages at .05 coverage. It is built for owners of HL-3140CW, HL-3150CW, HL-3170CDW, HL-3180CDW, MFC-9130CW, MFC-9330CDW, MFC-9340CDW and DCP-9020CDN machines who want a complete refresh in one purchase. The units are new and designed to match OEM fit. Buyers who need only a single colour or who use non-Brother hardware should look elsewhere.

Consistent output across long print runs

Each drum maintains stable density and registration from the first page to the rated 15000-page limit when operated at the specified .05 coverage. Colour balance holds without the drift that sometimes appears on cheaper aftermarket drums after a few thousand pages. The design handles the thermal cycles of continuous batch printing on the listed HL and MFC models. Environments that regularly exceed the coverage assumption will see a shorter useful life.

Straightforward swap with a few common pitfalls

Installation follows the standard Brother sequence: shake the toner cartridge six to eight times, remove the orange protective cover, seat the cartridge into the drum, then insert the combined assembly until it clicks. The most frequent error is forgetting to peel the cover before locking the unit in, which blocks toner flow. Another issue is mixing the colour-coded drums into the wrong slots, which the printer will reject. No tools are required.