The CS421H High Yield Printer Toner Cartridges 4pk in Black, Cyan, Magenta, and Yellow by Kanten is specifically designed for Lexmark printers. With a print technology of laser, these high yield toner cartridges offer long-lasting and high-quality printing performance. The manufacturer provides a 1-year warranty for added peace of mind, ensuring reliable and consistent results with each print. Compatible with the Lexmark CS421 model, these cartridges in various colors are ideal for producing vibrant and professional-looking documents and images.