This is a compatible Canon 4791B003AA (GPR-42) black laser toner cartridge guaranteed to perform with your Canon laser printer. It replaces the original Canon GPR-42 laser toner cartridge. The compatible replacement 4791B003AA 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 Canon GPR-42 and offer high-quality printing results. Manufactured 100% brand new, containing only new components, they are an economical alternative to expensive OEM 4791B003AA Canon 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 4791B003AA (GPR-42) laser toner cartridges and supplies. For use in the following printers: Canon ImageRunner Advance 4045, 4051, 4225, 4235, 4245, 4251. We are the exclusive reseller of LD Products brand of high quality printing supplies on Newegg.