Ricoh 821181, 821182, 821183, 821184 Standard Yield Toner Cartridge Set - Lanier SP C831DN Approximately 23,500 pages for black and 27,000 pages for colored Competitive price with high quality/stable printing capacity/smart and fluent printing performance Saves ink and reduces damage to the printer head. Easy to Install and Use Compatible: Lanier SP C831DN / Ricoh Aficio SP C830DN / Ricoh Aficio SP C831DN