Designed by Canon engineers and manufactured in Canon facilities, GENUINE supplies are developed using precise specifications, so you can be confident that your Canon device will produce high-quality results consistently. High Capacity toner options keep up with your busy printing needs, so you have less replacement efforts and more time. The Single-Cartridge System combines the toner and drum into the same unit, which means you only have one consumable to replace. The MF740 series and the LBP664Cdw use Canon GENUINE Toner, Cartridge 055 CMYK (CMY yields 2,100 pages / K yields 2,300 pages) and Cartridge 055 High Capacity CMYK (CMY yields 5,900 pages / K yields 7,600 pages) (ISO/IEC standard).