Save money when you purchase our compatible Canon ImageClass 4000ED toner cartridges while maintaining the same name-brand quality you are used to. To ensure the best printing experience, we engineer our toner cartridges based on the specifications of your original Canon cartridges. As a part of our production process, these toner cartridges for Canon ImageClass 4000ED printers are visually inspected and tested to ensure you receive a quality product with every order. We offer a 100% satisfaction guarantee with all printer ink and toner cartridges.