For use in models: IM C4500, IM C5500, IM C6000 (note: not for Models with MP C prefix) Compatible Toner replacement for Ricoh toner Type IM C6000, 842279, 842282, 842281, 842280 PREMIUM Toner kit contains 4 cartridges; MADE IN USA (not imported) 33,000 pages per black cartridge, 22,500 pages per color cartridge; based on the ISO/IEC 19798 industry standard of 5% page coverage