I just got a sample of what I'm almost positive is RPM Blast, a Babolat-sponsored touring pro (can't remember his name but he is actually sponsored by Babolat which makes me think this is legit) came to the academy I go to and he had a ton of sample packages of a black Babolat string that he says is the string Nadal, Tsonga, Roddick, etc.. switched to. The package is just a plastic box with a sticker that says B-432C and then it says the gauge (16). All it says on the string itself is "Babolat" nothing else. Now I'm ordinarily a Luxilon man but I might give this a try, seeing as I have a sample I might as well, anyways, I'll post a review in a couple of weeks