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 MF642Cdw uses Canon GENUINE Toner, Cartridge 054 CMYK (CMY yields 1, 200 pages / K yields 1, 500 pages) and Cartridge 054 High Capacity CMYK (CMY yields 2, 300 pages / K yields 3, 100 pages) (ISO/IEC standard).