Yourlink4ink.com Copier Toner Cartridges are ISO-9002/14001 factory certified and compatible with big name copier manufacturers like Canon, Konica, Minolta, Ricoh, Xerox, and more. Knowing that most companies are under contracts with their supplies included is highly NOT recommended.  To put your machines under contracts that include your toner supplies gives Schools, Government agencies and corporate accounts a false sense of savings. Most companies will not tell you about the 300% mark up they make on the supplies while putting your machines under these particular types of contacts. Schools and Government agencies are better off leasing just the machine with service included and leaving the supplies as a separate purchase. Call one of highly trained representatives today for further information.