Alternative to HP Q5951 A Cartridge is manufactured within locations accredited to ISO14001 & ISO9001 Cartridge complies with the requirements of Europe's REACH regulations (Registration, Evaluation, Authorisation & Restriction of Chemicals) Cartridge Ref 643 A Toner cartridge outer packaging is made from 70% recycled card & both the plastic & card used in the packaging can be fully recycled Page Life approx: 10000 pages