A must for all businesses that have high volume printing needs the Original HP 304A Black Toner Cartridge Twin pack is designed for frequent use and will save you time and money, minimising the need for replacements with a high page yield of 3,500 per cartridge.Included in this twin pack are 2 x 304A black toner cartridges that contain the HP Colorsphere toner, specifically formulated to create uniform shaped and sized particles to consistently give your documents a professional touch and reduce smudging and fading.