LD Compatible Toner Cartridge Replacements for Dell 593-BBKD P7RMX High Yield (Black, 2-Pack) Page Yield: 2,600 per cartridge | Shelf Life: 24-36 months per cartridge The use of compatible cartridges and supplies does not void your printers warranty All LD branded products are backed by a 100% satisfaction and LIFETIME guarantee These compatible cartridges come equipped with an ink indicator chip that accurately tracks your ink level and communicates with your printer to be sure you are receiving the best quality print possible For use in the following Dell Printers: Laser- E310dw, E514dw | Multi-Function- E515dn, E515dw