HP 25X Black. Page yield: 40000 pages, Print technology: Laser, Brand compatibility: HPdldtPage yield/dtdd40000 pages/dddtPrint technology/dtddLaser/dddtBrand compatibility/dtddHP/dddtCompatible products/dtddLaserJet/dddtPrinting colours/dtddBlack/dddtQuantity/dtdd1/dd/dl