No it isnt. You need the ones that are specifically made by Volks for the GT series wheels.
I'll get you some pictures when I get a minute, Jacko.
Took me a while to track these down, nobody keeps them in stock (or didnt when i bought them) in the US. But they can be sourced.
Like I say, I'll get you more details tomorrow.
Thanks Baptist, let me know and I'll pm you my email address if you want.
Also at the same time, if you know what these things are called then I can start trying to source them.....
Thanks all anyway,