2MB Flash SIMM Part#: 45H0021 Use flash memory to store fonts or macros. For use with all models of Lexmark Optra Color 45 and Lexmark E322, E322n. Also for use with all models of Optra S, Optra Se, Optra E310, E312 and Optra SC. 64MB Flash Card Use flash memory to store forms, fonts or macros.