The Genuine Kyocera TK-8315K Black Toner Cartridge is specifically designed for use with Kyocera printers, such as the 2550ci model. With a yield of 12,000 pages, this original Kyocera product ensures high-quality printing results every time. The black toner cartridge is easy to install and provides long-lasting, professional-quality prints. Backed by a lifetime manufacturer warranty, this genuine Kyocera cartridge is a reliable choice for all your printing needs.