What is/are in the package?593-BBKD (E310/E515) x 20 PacksHow many pages do these print up to?Each prints up to 2,600 pages based on 5% coverage (High Yield)How do you install the toner cartridge?Step 1: Open the front coverStep 2: Remove the toner cartridge drum unit assemblyStep 3: Take out the toner cartridge by pushing down the lock leverStep 4: Remove the orange cover from the new toner cartridgeStep 5: Assemble the toner cartridge and the drum unit, you should hear a "Click" sound if you put the toner cartridge in correctlyStep 6: Clean the corona wire by sliding the tab from side to side several times (Make sure the arrow on the tab is aligned with the arrow on the drum unit, otherwise, you will get vertical stripes on your printouts)Step 7: Insert the assembled toner cartridge and drum unit back into the printerStep 8: You may print nowWhat are the compatible printers?Dell E310dw, E514dw, E515dw, E515dnGTS offers money back warranty on defective toner cartridgesPlease store the unused/unopened toner cartridges in a dry and cool place. Avoid sun exposureHave a question or a problem?Please do not hesitate to contact us, our Customer Services Team will usually response your email or message within 1-2 business days.