This is a remanufactured replacement for the HP C8543X MICR (43X) black laser toner cartridge. It is specifically designed for printing checks, utilizing a special iron in the toner that is detectable at banks. The cartridge is built using both OEM and non-OEM components to ensure high-quality prints and reliability. Economical and sensible, this remanufactured toner offers an alternative to expensive OEM cartridges without voiding your printer's warranty. Backed by a 100% Satisfaction Guarantee.