The product is a yellow toner cartridge compatible with OKI printers such as the C3400n, C3530MPF, C3600, and MC360. Specifically designed for use with mediasciences printers, this new toner cartridge ensures high-quality yellow color output for professional printing needs. With its compatibility with multiple OKI printer models, this toner cartridge is a reliable and convenient option for users looking to maintain consistent and vibrant color printing results.