This HP Q3964A Compatible Drum Cartridge is a high quality compatible cartridge. The Q3964A compatible drum ensures high quality colour prints whilst saving money and helping the environment in the process. The compatible Q3964A toner maintains prints quality vibrant, colourful images and documents in combination with the other toners in the series. This HP Q3964A Compatible Drum Cartridge prints approx 20000 (black) pages at 5% average coverage. Colour LaserJet 2550,Colour LaserJet 2550l,Colour LaserJet 2550ln, Colour LaserJet 2550n,Colour LaserJet 2800,Colour LaserJet 2820,Colour LaserJet 2830,Colour LaserJet 2840