For use on: HP Laserjet 4500/4500n4500dn/4550 Color: Black 1)New compatible 2)Competitive price 3)Excellent printing effect 4)High quality 5)Fast delivery 6. ) The toner cartridge with Mitsubishi OPC and LG toner Stability quality, strong fuser film fixation, lower waste powder, No gray background 7)100% compatible with original toner Welcome to contact us for more information and your enquiry shall be highly appreciated!