Compatible with the HP LJ 4100 Series Cartridge Model: C8061X 10,000 Estimated Page Yield at 5% coverage All of our products come with a one year warranty from the date of sale. We offer a NO HASSLE GUARANTEE. If our products fail to perform up to your standards simply return it for a refund. We guarentee our cartridges will meet or exceed OEM(Brand Name) specifications and quality. All brand names and model numbers are used for reference only; all brand names are property of their respective owners.