SeriTek/5PM-6G: 5-Bay External PM Enclosure with SeriTek/6G ExpressCard/34 adapter for MacBook Pro and Windows Notebook $629.95 SeriTek/5PM-2SM2: 5-Bay External PM Enclosure with ExpressCard/34 adapter for MacBook Pro and PC Notebook Computers $629.95 SeriTek/2ENSM2-E: External Bundle for MacBook Pro & PC Notebooks $309.95 SeriTek/2ENSM2: External Bundle for Notebooks $279.95