Alternative to HP CE251A Cartridge Ref 504A 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: 7000 pages