Printing Performance: USUPERINK E40 toner cartridge is optimally designed to compatible for Canon printer. It provides excellent printing performance. We are so confident in the quality and performance of our cartridge that we extend it to a FULL Usage. Select USUPERINK Toner Cartridge With Confidence! Item Name: USUPERINK Black Toner Cartridge Replacement Compatible for Canon E40/E30/E31/E16/E20 High Yield Toner Cartridge. High Page Yield: Each black cartridge can print up to 4,000 pages for A4 papers at 5% coverage (Actual toner yield varies with usage, graphics printed and environmental conditions). High Quality Standard: USUPERINK toner cartridges have stable compatibility, good recognition, reliable performance, high purity toner prowder, print with crisp text. Wide Application: Widely use in home, office, school, bank, small business, large business and organisation and other fields.