CFexpress Type A and Type B are two different cards, they are not the same size and will not fit into the same reader. The CFexpress Type B card (and reader slot) is approximately 35% larger than the CFexpress Type A card (and reader slot). Additionally, Type A cards are slightly smaller than an SD card and Type B cards are the same size as XQD cards. This is the CFexpress Type A Reader (PG09) if you need a CFexpress Type B Reader please see our CFexpress Type B and SD Dual-Slot Reader (PG05.5).