The HP Color LaserJet Print Cartridge Q3971A and Q3973A is a genuine original product by HP designed for use in HP LaserJet 2550, 2820, and 2840 printers. These cartridges are compatible with the printers and offer high-quality color printing with cyan and magenta tones. Made with laser print technology, these cartridges are reliable and efficient for producing professional-quality prints. Each cartridge has a unit quantity of 2 and measures 6 meters in height, providing consistent and consistent results with every use.