I would expect these to do the job, and of course they do. My comment is on the vendor (at the time of writing Digizouk). Beware the shipping prices; £4.50 each. They state in their confirmation email this is fixed by Amazon but Amazon do not regulate Marketplace shipping costs. I can understand the cost if two large, dissimilar items requiring picking and packing, but not 2 CF cards that can fit in an A5 jiffy. Amazon have suggested I negotiate with Digizouk while they investidate their claim that Amazon are forcing the shipping cost. So far Digizouk have refused to respond to any communication execept with automated emails.
Having said that the product is very very cheap even with the silly shipping costs so if you don't mind being ripped off, buy them of course.