Produce professional results time and again with this Original Samsung D4550B (ML-D4550B/ELS) Black Toner Cartridge. This Genuine ML-D4550B Toner Cartridge is a brand new product designed by Samsung with the user in mind. The Black 4550B Cartridge is easy to use and install and will provide accurate Toner levels throughout the life of the Cartridge, giving you plenty of time to reorder supplies. Achieve lower running costs by using the Original D4550B Black Toner Cartridge as it contains enough high quality toner powder to produce up to 20,000 pages (based on a 5% coverage). This Genuine ML-D4550B/ELS is designed to be compatible with Various Samsung Printers. A full list of compatible Printers can be found on this page.