The product is a set of 5 black ribbon cartridges designed for use with the Epson LX-350 LX350 Dot Matrix Printer. These cartridges are specifically branded by Epson and are compatible with Epson printers. The cartridges are part of the Epson LX product line and are designed for use in dot matrix printing technology. This product ensures high-quality printing results and is a reliable choice for Epson printer users looking to replace their ribbon cartridges.