The HP 824A CB384A Compatible Drum Cartridge Bundle Pack 4 Drum Units contains all HP Compatible Drum Units in the 824A Series with a higher average page yield that that of the original drum units at a fraction of the cost. This bundle set includes the following: HP CB384A Compatible Black Drum UnitHP CB385A Compatible Cyan Drum UnitHP CB386A Compatible Yellow Drum UnitHP CB387A Compatible Magenta Drum Unit Colour LaserJet CM6030 MFP, Colour LaserJet CM6030f, Colour LaserJet CM6040 MFP, Colour LaserJet CM6040f, Colour LaserJet CP6015