HP 915XL Ink Cartridge value pack BK+C+M+Y Compatible OEM Part No. 3YM19AA 3YM20AA 3YM21AA Yield: Same as genuine HP ink cartridgeBlack - 915XL Black 825 PagesCMY = 915XL Colour (Cyan or Magenta or Yellow) ink cartridge Yield: 825 Pages For use in the following model..