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Each cartridge individually print tested at manufacturing stage.. For Kyocera Printers - KM2530, KM3035, KM3530, KM4030, KM4035, KM5035, COPIA D25, COPIA D35, COPIA D40, COPIA D300, COPIA D400, COPIA D500. Colour - Black. Yield - Up to 40,000 pages.