All 5 Star remanufactured cartridges are remanufactured from empty OEM cartridges that are collected, cleaned and 70-90% (by weight) of the components are used again (remanufactured cartridges only) Toner cartridges all receive a replacement drum, which is the most critical component within the cartridge, to ensure that a quality product is delivered Toner cartridges create 60% less CO2 emissions and 16,000 tonnes less waste than are created during the manufacture of original cartridges Inkjet cartridge blister packaging is produced from R-PET, containing up to 80% recycled plastic Toner cartridge outer packaging is made from 70% recycled card and both the plastic and card used in the packaging can be fully recycled 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) Inkjet and toner cartridge yields are equal to the original cartridge manufacturers Lifetime warranty on all toners and 2 years on inkjet cartridges Compatible Inkjet Cartridge for Canon CLI-521BK Black Suitable for: PIXMA iP3600, PIXMA iP4600, PIXMA MP540, PIXMA MP620, PIXMA MP630, PIXMA MP980