Authentic hp toners are already great value for money but buy this handy dual pack and save even more the 85a cartridge has a duty cycle of up to 1600 pages which makes it ideal for heavy users and those such as offices and schools which regularly have long print runs being an official hp product the toner is specially formulated for use with their laserjet pro range and will ensure smooth and trouble free operation the toner delivers smooth and razor sharp print quality