Our remanufactured alternative laser toner cartridges have been specially engineered to meet the highest standards of quality, reliability and exceptional yields that meet or exceed OEM (Original Equipment Manufacturer) standards and offer high-quality printing results. A remanufactured laser toner cartridge is an original Canon cartridge which has gone through one cycle of service and has been recharged. It is not just refilled; it undergoes an extensive process that ensures quality prints. The empty cartridge is first visually & electronically tested to ensure the circuitry is intact; it is then completely disassembled and goes through a cleaning. The Canon 121 toner cartridge is then configured back together, filled with the same toner powder formulation as the original, inspected for any possible shell leakage, and then is run through an actual print test. If the 121 toner cartridge cartridge passes our rigid standards it has been remanufactured! Why buy expensive OEM laser toner cartridges when you can buy a remanufactured laser toner at a fraction of the cost? Our remanufactured products are backed by our 100% Satisfaction Guarantee! OEM laser toner cartridges are also available for your Canon ImageClass D1620.