Oh, you mean which one? That is a Crystal, made in Israel by Personna. They are sometimes referred to by some as Israeli Personna (or IPs). But sometimes people mean something else when they say, IP, so I think calling them by their proper name, Crystal, is best. They come in different looking boxes, but I think they are all the same if they say Crystal on them.
BTW, I find them a pretty good, middle of the road, blade. They seem to work fine in all my razors.