This genuine OKI Black Toner Cartridge 43502301 is compatible with various OKI Data printers including B4400, B4500, B4550, and B4600. The cartridge is designed to produce high-quality black prints and is perfect for professional printing needs. It is made with advanced technology to ensure consistent and reliable performance. The cartridge is easy to install and is designed to work seamlessly with your OKI printer. It is a great choice for those who need to produce high-quality black prints for their business or personal needs. This product is ideal for those who value quality and reliability.