Compatible with: MailStation2 K7M0 Page Yield*: 800 For best results, store in a cool, dry place. Use within 36 months of purchase for optimal performance. *at 5% coverage (ISO/IEC standard) Exceeds USPS requirements for fluorescence Exceeds USPS requirements for fluorescence Please contact us first with any product issues. We want all of our customers to be happy because happiness matters.