Xerox have been producing some of the finest quality black toner cartridges for many years and this original 106R03620 easily qualifies. Containing sufficient black powder to print an estimated 2,600 prints, this 106R03620 mono laser toner cartridge offers reasonable economy too.Compatible with several monochromatic laser printers (including the Xerox WorkCentre 3345) that all offer an astounding quality of black and white print, the genuine 106R03620 is a natural choice for those who demand the best.