For use in models: IM C3000, IM C3500 (note: not for Models with MP C prefix) PREMIUM Toner kit contains 2 cartridges; MADE IN USA (not imported) 31,000 pages per black cartridge, based on the ISO/IEC 19798 industry standard of 5% page coverage Our toners are formulated to match density, line resolution and cartridge yield. QUICK SHIPPING and 100% Performance Guarantee