Office Mountain 5-Pack Compatible Black Toner Cartridge 44992407 for OKI MB451 MB451w MB451w MFP | Rated for 2500 pages Office Mountain Brand, not OEM Product. High Yield: 2500 Pages/BLACK per Toner Cartridge at 5% coverage (Letter/A4) Compatible with OKI MB451 MB451w MB451w MFP Condition: New compatible, from ISO 9001/14001 certified factory, not OEM. 100% Satisfaction Guarantee: 12-Month Warranty and 18-Month Shelf Life