I bought this over in the 911 used parts forum. I didn't ask what size it is. It's a 16mm which, from what I can find is the size required for the newer 996,997 etc. It's a Klein flexible spark plug tool. The tool measures six inches from top where torqx wrench inserts to the bottom. It appears to be in excellent shape. I paid $58 for it with shipping. If anyone needs one, I have no use for it.
Also if it's doesn't fit these cars please let me know. I don't want to advertise it as something it is not.