^^ Exactly. These are DPA knockoffs. The problem is that they are not a lot cheaper than the DPA, at least for the bare capsules. The advantage these have is they have P48 power supplies with detachable heads for them. And they have cardioid versions, which are pretty rare in measurement capsules. I would love to hear these.
If you want omni measurement capsules (eg., 1/2" or 12mm, that I have been looking at), there are lots of options, including DPA, G.R.A.S. (both Denmark) and Aco-pacific (Japan), Geffel (Germany). DPA and G.R.A.S. are around $1000 each, while Aco-pacific are about $600. Not sure on the Geffel price.
Richard