Canon PC420 (0000A010) is a monochrome personal copier. This model uses a standard yield and a high yield black toner cartridge. The page yield for the standard yield and high yield toner is up to 2,000 and 4,000 pages at 5% coverage per page. The toner cartridge part numbers are E20 (1492A002AA) for the standard yield toner and E40 (1491A002AA) for the high yield toner. Canon PC420 features Canon's single cartridge system, you are assured of virtually maintenance-free performance, making it very cost effective with just one easy to replace cartridge.