This set includes four compatible toner cartridges for use in Dell printers, specifically designed to replace the original Dell 331-0778 (black), 331-0777 (cyan), 331-0780 (magenta), and 331-0779 (yellow). Each cartridge is engineered to deliver high-quality prints with a total yield of up to 3,400 pages. These cartridges are a cost-effective alternative to original Dell brand toner, ensuring reliable performance without voiding your printer's warranty. Backed by our 100% Quality Satisfaction Guarantee.