Green Toner Supply&trade; Compatible Toner Cartridge Replacement for Dell 3100 (1 Black, 1 Cyan, 1 Yellow, 1 Magenta, 4-Pack) Green Toner Supply offers LIFETIME WARRANTY against manufacture defects Green Toner Supply offers 2 Years Money Back Guarantee on Manufacture Defects Print Yield: Up to 4,000 Pages at 5% Coverage Green Toner Supply Compatible Toner Cartridge Replacement for Dell3100 works with the following machines: 3000cn Color Laser Printer, 3100cn Color Laser Printer Green Toner Supply cartridges were professionally manufactured in an ISO 9002 factory