For use with: Optra S 1250, 1250n, 1620, 1620n, 1650, 1650n, 2420, 2420n, 2450 and 2450n, Optra S 1255, 1255n, 1625, 1625n, 1855, 1855n, 2455 and 2455n Laser Printers. Yield: Up to 17,600 pages @ approximately 5% coverage.”