Inkjet cartridge blister packaging is produced from R-PET, containing up to 80% recycled plastic In the unlikely event that a faulty cartridge causes damage to a printer, the cost of repair will be covered 2 year warranty on inkjet cartridges 5 Star compatible inkjet cartridge built from new components Alternative to Canon CLI-521BK Colour: Black Page Life approx: 425 pages Cartridges are manufactured within locations accredited to ISO14001 and ISO9001 Cartridges comply with the requirements of Europe's REACH regulations (Registration, Evaluation, Authorisation and Restriction of Chemicals) Cartridge Ref: 521