TROY is a global technology company whose legacy of innovation and commitment to engineering excellence are reflected in an extensive line of hardware and software technologies and solutions, designed to meet the evolving needs of Internet and Wireless Appliance Connectivity. In addition to its award-wining line of solutions, TROY offers a complete line of printer consumables and accessories. This toner cartridge is designed for TROY MICR 4100 Ex and HP LaserJet 4100 series printers.