Alternative to HP C9730A Cartridge Ref 645A 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) Page Life approx: 13000 pages Toner cartridge outer packaging is made from 70% recycled card and both the plastic and card used in the packaging can be fully recycled Compatible Printers: Color LaserJet 5500/5550 Series