Brother DR-273CL Drum Unit. Contains four drum units; one black and three colors of cyan, magenta & yellow. Duty Cycle: 18,000 pages For use with: • Brother HL-3210CW • Brother HL-L3230CDW • Brother HL-L3270CDW • Brother DCP-L3551CDW • Brother DCP-L3510CDW • Brother MFC-L3735CDN • Brother MFC-L3750CDW • Brother MFC-L3770CDW