Compatible with: HP: OfficeJet 4500, G510a, G510g, G510n, J4524, J4540, J4550, J4580, J4624, J4660, J4680, J4680c, J4860 Page Yield*: 200* *Average cartridge Page Yield* in accordance with ISO IEC 24711. *at 5% coverage (ISO/IEC standard) Color: Black For best results, store in a cool, dry place. Use within 18 months of purchase for optimal performance. This ink formula is specially designed to produce vibrant and long-lasting prints comparable to HP. Please contact us first with any product issues. We want all of our customers to be happy because happiness matters.