Alternative to HP Q7551X Cartridge Ref 51X 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 Page Life approx: 13000 pages