This is a compatible Canon 0259B001AA GPR21 yellow laser toner cartridge guaranteed to perform with your Canon C4080 or C4580 laser printer. It replaces the original Canon GPR21 laser toner cartridge. The compatible replacement 0259B001AA laser toner cartridges and supplies also known as generic are specially engineered to meet the highest standards of quality, reliability and exceptional yields that meet or exceed OEM Original Equipment Manufacturer standards for the GPR21 and offer high-quality printing results. Manufactured 100% brand new, containing only new components, they are an economical alternative to expensive OEM 0259B001AA Canon laser toner cartridges and supplies, and offer big savings over brand-name GPR21 laser toner cartridges and supplies. The use of compatible replacement laser toner cartridges and supplies does not void your printers warranty. We offer a Two Year 100% Quality Satisfaction Guarantee on our compatible 0259B001AA GPR-21 / GPR21 laser toner cartridges and supplies. LD Cartridges are manufactured in an internationally certified ISO 9002 factory. LD cartridges come with a 100% Two Year money back guarantee and technical support. For use in the following printers Color ImageRunner C4580i, C4080i Canon ImageRunner C4080, ImageRunner C4580.