This is a compatible Canon 0260B001AA (GPR21) magenta laser toner cartridge designed for use with your Canon C4080 or C4580 laser printer. It offers a standard yield of up to 30,000 pages, providing a cost-effective solution for high-volume printing needs. Manufactured with high-quality components, this cartridge serves as an economical alternative to the original Canon GPR21 toner cartridge, ensuring reliable performance and exceptional print quality. The use of compatible cartridges does not void your printer's warranty, and we back this product with a 100% Quality Satisfaction Guarantee.