The Compatible Lexmark T640 (64035HA) Toner Cartridge in Black is a high-yield unit designed for Lexmark printers. With a print technology of laser, this toner cartridge provides crisp and professional-quality black printing. The Triumph brand ensures quality and reliability, making it an ideal choice for those looking to replace their Lexmark T640 toner cartridge. Easy to install and provide excellent results, this cartridge is a cost-effective solution for those in need of a reliable printing supply.