The HP Q3960A Black Toner Cartridge will work with your printer to deliver exceptional print quality and years of reliable performance. You'll experience consistently smooth, professional results for up to 5,000 pages. Bring out the best in your printer and your work with the HP Q3960A. This cartridge is compatible with the Color LaserJet 2550 series, 2820 series, and 2840 All in One series printers.