Les Parties Du Microscope Compos Et Leurs Fonctions HP 55A (CE255A) Black Original LaserJet Toner Cartridge. Ensure schedules, reports, invoices and other important prints have high quality by using this black toner cartridge. The cartridge features a print yield of up to 6,000 pages, making it optimal for use with daily printing jobs. This HP 55A LaserJet toner cartridge is compatible with select HP printers for effortless installation.