HP Q7581A Toner Cartridge This premium compatible Q7581A Toner Cartridge is produced in Canada in a ISO 9002 controlled production facility using the industries finest quality toner and highest grade OEM equivalent Q7581A laser toner components. Resulting in superb quality high contrast pin-sharp prints and excellent page yields. Not all compatible toner cartridges are created equal, most others are just low cost Drill & Fills.