Compatible with: HP LaserJet: 4200, 4200dtn, 4200dtns, 4200dtnsl, 4200n, 4200tn Professionally manufactured by LD Products Page Yield*: 12,000* For best results, store in a cool, dry place. Use within 3 years of purchase for optimal performance. *Average cartridge Page Yield* in accordance with ISO IEC 24711. *at 5% coverage (ISO/IEC standard) All LD compatible and remanufactured cartridges are quality tested to ensure long-lasting use and bold, vivid print on every page Please contact us first with any product issues. We want all of our customers to be happy because happiness matters.