Do it Wiser &reg; Compatible High Yield Toner Set Black Cyan Magenta Yellow for Oki Okidata C510 C510dn C511 C530dn C531 MC561 MC562dn - 42127412 42127411 42127410 42127409 - Extra High Yield 5,000 pages (4 Pack) Compatible with part number 42127412 42127411 42127410 42127409 Compatible Toner Cartridge with Okidata C510dn C530dn MC561. Do it Wiser Smart Toner Cartridges are covered by 1 year warranty against defects Cartridges certified to work | ISO 9001 quality assurance | ISO 14001 environmental management | RoHS Lead Free Estimated page yield: 5000 pages (depends on printer and usage)