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 consistent, high-quality results. The Single-Cartridge System combines the toner and drum into the same unit, which means you only have one consumable to replace. The image CLASS D1600 series use Canon Genuine Toner, Cartridge 121 Black (yields 5, 000 pages, ISO / IEC Standard).