Calitoner Compatible Laser Toner Cartridge Replacement for HP C4127X (HP 27X) - Black Print Technology:	Laser Printer(s):	HP LaserJet 4000, 4000n, 4000se, 4000t, 4000tn, 4050, 4050 usb-mac, 4050n, 4050se, 4050t, 4050tn Replaces OEM Part #:	C4127X (27X) Cartridge Color:	Black Page Yield:	Up to 10000 pages, High Capacity