Green Toner Supply&trade; Remanufactured Ink Cartridge Replacement for HP 901XL + 901 (4 Black, 3 Color, 7-Pack) Green Toner Supply offers LIFETIME WARRANTY against manufacture defects Green Toner Supply offers 2 Years Money Back Guarantee on Manufacture Defects Black Print Yield: Up to 700 Pages at 5% Coverage ; Color Print Yield: Up to 360 Pages at 5% Coverage Green Toner Supply Remanufactured Ink Cartridge Replacement for HP901XL works with the following machines: HP Officejet J4540 All-in-One Printer, HP Officejet J4550 All-in-One Printer, HP Officejet 4500 Wireless All-in-One Printer - G510n, HP Officejet 4500 All- Green Toner Supply cartridges were professionally manufactured in an ISO 9002 factory