Do it wiser Smart Toner Cartridges can help you reduce printing cost while delivering bright colours and sharp text. Compatible with part number 106R02232, 106R02229, 106R02230 and 106R02231. Compatible printer models: Xerox Phaser 6600 6600n 6600dn 6600dnm, Xerox WorkCentre 6605 6605n 6605dn. Each cartridge has a capacity of: Black: 8000 pages, Colours: 6000 pages per cartridge at 5% coverage (Letter, A4). Do it Wiser Smart Toner Cartridges are guaranteed to work flawlessly, certified by ISO 9001 international quality standard, ISO 14001 environmental management, and free of lead and hazardous materials RoHS Lead Free.