Ideal for high volume users this genuine hp cartridge has a huge duty cycle of around 6000 pages. Sufficient to meet the printing requirements of most small or medium business. This sizable yield provides a low cost per page price of just 2p correct at the time of writing making this cartridge an economical as well as practical solution. Reliable and consistent results official hp cartridges produce excellent, professional grade documents every time. No matter how lengthy the print run the last copy will be as good as the first. It is this consistently high performance which differentiates genuine manufacturers toner from cheap, but poor quality, lsquocompatible toners produced by unofficial suppliers. Official hp toner is of course specifically engineered for their own laserjet printers. This provides efficient and trouble free printing whereas unofficial products not only produce lower quality results but can also damage the printer itself. This causes downtime, loss of production, and even more expense. Recycle for free at the end of its life disposal of the empty cartridge is easy thanks to hps free recycling scheme. When empty the cartridge can be returned to hp free of charge to be ethically recycled. Key features one cartridge in the box black toner free recycling scheme official hp consumable formulated for high volume users duty cycle of 6000 pages compatible with hp laserjet 1320, 1320n, 1320nw, 1320t, 1320tn, 3390, 3392