LD Compatible Ink Cartridge Replacement for Pitney Bowes 797-M (Fluorescent Red, 4-Pack) 100% Satisfaction & LIFETIME Guarantee For use in Pitney Bowes MailStation K7M0 Page Yield Per Cartridge: 800 | Shelf Life: 36 Months The use of compatible ink cartridges and supplies does not void your printers warranty LD compatible postal meter red ink cartridges exceed USPS requirements for fluorescence