This is a compatible Canon 0261B001AA (GPR21) cyan laser toner cartridge designed for use with Canon C4080 and C4580 laser printers. It offers a standard yield of up to 30,000 pages, providing an economical alternative to the original Canon GPR21 toner cartridge. Manufactured with new components, this cartridge ensures reliable performance and high-quality printing results. The use of compatible toner cartridges does not void your printer's warranty, and it is backed by our 100% Quality Satisfaction Guarantee.