Our compatible HP Color LaserJet 4550n toner cartridges are designed for user-friendly installation and deliver high-quality results with every page. Each cartridge is designed specifically for your printer's functions and capabilities, ensuring easy installation into your HP printer. We inspect and test our toner cartridges for HP Color LaserJet 4550n printers to ensure they offer the performance of an original HP cartridge for less. Our comprehensive 1-Year warranty and 100% customer satisfaction guarantee provide our customer with complete peace of mind. The warranty encompasses all aspects of the cartridge including page yield and print quality. Buy with confidence knowing that we stand behind our products.