Use : To mount two microSD cards instead of a CF card. The adapter has the template of a compact Flash type I card, namely the finest of the two (the type II is thicker, and the type I cards can be mounted on locations for type I or for type II). Description : Maximum capacity 128GB (a map of 128 or two cards of 64). The microSD cards fully enter the adapter which is to the usual ribs of a CF I card (36.4 x 42.8 x 5mm) Will work on PDAs, cameras, printers etc ... under 3.3V. Suitable for microSD, SDHC, SDXC and also MicroSD 3.0 (accepts Windows files) from 4 to 64GB. CF interface Compatible IDE MODE / MEMORY MODE / IO MODE.
eBay