Compatible Toner Cartridges (1 Black, 1 Cyan, 1 Magenta, 1 Yellow) for HP LaserJet 2550, 2820 And 2840 Printers - 4 Pack Compatible with HP Color LaserJet 2550 Series and 2820, 2840 Models One year manufacturer warranty against product defect 30-day satisfaction money back guaranteed Remanufactured under highest standards Full Color Set Includes: Black, Cyan, Yellow, Magenta