Compatible with: HP LaserJet: 4345, 4345mfp, 4345x mfp, 4345xm MFP, 4345xs MFP, M4345 MFP, M4345x MFP, M4345xm MFP, M4345xs MFP Page Yield*: 18,000* 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 Professionally manufactured by LD Products. HP is a registered trademark of HP Inc. and is not affiliated with and does not endorse LD Products. Please contact us first with any product issues. We want all of our customers to be happy because happiness matters.