What is OEM? OEM means Original Equipment Manufacturer, in other words it's a genuine toner, inkjet, or ribbon directly made by its manufacturer and labeled by the manufacturer. OEM C8561A Drum Unit manufactured by Hewlett Packard is completely brand new. The OEM printing products are manufactured to the highest quality as well as the best performance. When buying OEM products, you are getting the best printing quality for your printing needs. The cost of OEM printing products s is usually a little more expensive, but the print quality is better and longer lasting. Think Toner offers all OEM Ink Cartridges at our everyday low prices. You will be satisfied with the print quality and longevity of your OEM C8561A Hewlett Packard Drum Unit