This is a compatible replacement cartridge for the HP CF279A MICR (79A) black laser toner cartridge. Designed specifically for printing professional checks, this toner features a special formulation that allows checks to be detected by bank scanning systems. It delivers a yield of up to 1,000 pages, ensuring reliable performance for your printing needs. Our toners are an economical alternative to expensive OEM cartridges, and using them does not void your printer's warranty. Backed by our 100% Satisfaction Guarantee.