Two year warranty on all toners In the unlikely event that a faulty cartridge causes damage to a printer, the cost of repair will be covered Cartridge is manufactured within locations accredited to ISO14001 and ISO9001 Cartridge complies with the requirements of Europe's REACH regulations (Registration, Evaluation, Authorisation and Restriction of Chemicals) Toner cartridge outer packaging is made from 70% recycled card and both the plastic and card used in the packaging can be fully recycled ISO certification (ISO19752) for mono and ISO19758 for colour cartridges Alternative to HP Q7551A Cartridge Ref 51A Page Life approx: 6500 pages