Ricoh Aficio MPC4000 1-SD Yld Black Toner Yield 23,000 Ricoh Aficio MP C4000 C5000 Lanier LD540 LD550 Savin C4040 C5050 Black Toner Cartridge (510 gm) (23 000 Yield) OEM Toner Black 23000 Pages Standard Yield Easy Installation