HP Laser jet 42A Toner Refill | HP Laser jet 4240 / 4250 / 4350 Printer Toner Refill - YouTube
Amazon.com: LD Products Compatible Toner Cartridge Replacement for HP 42X Q5942X High Yield (Black) for use in HP Laserjet / Multifunction Printers 4250, 4250tn, 4350n, 4250dtn, 4350, 4350tn, 4250dtnsl, 4350dtn : Office Products