Toner Refill Store carries only the best quality Premium Compatible HP Color LaserJet 4550 High Yield Toner Cartridges. The HP Color LaserJet 4550 laser toner from Toner Refill Store is 100% guaranteed to meet or exceed your expections and surpass the print quality of the OEM (Original Equipment Manufacturer) HP Color LaserJet 4550 laser toner. Many HP Printers carry a High Yield cartridge and a Standard Yield cartridge. The High Yield cartridge will have an 'X' and the Standard Yield an 'A' at the end of the cartridge number. Toner Refill Store carries both the High Yield 'X' HP Toner Cartridges and the 'A' Standard Yield Toner Cartridges. The use of our premium compatible laser toner cartridges for the HP Color LaserJet 4550 does not void your printer's warranty. Our HP Color LaserJet 4550 high yield laser toner cartridge have a 'One Year 100% Satisfaction Guarantee'.