Lexmark 13T0101 Compatible Toner, for Lexmark Optra E 310/312 THIS CT13T0101 IS A PROFESSIONALLY MANUFACTURED COMPATIBLE TONER THAT REPLACES THE ORIGINAL LEXMARK 13T0101 BLACK TONER CARTRIDGE. THIS CARTRIDGE WAS ENGINEERED IN A MANUFACTURING FACILITY THAT USES STATE OF THE ART PROCESSES TO INSURE THAT THIS CARTRIDGE WILL PRINT AS WELL AS THE Works with the following models: Lexmark Optra E310, Lexmark Optra E312, Lexmark Optra E312L