Wheel stud size please :)

[r1flyguy1]

Can someone please tell me the dimensions of the wheel studs on a 997tt 2008 please

Thanks in anticipation

r1

[r1flyguy1]

Anyone???

[athomp04]

I believe its 19mm

Ashley

[r1flyguy1]

Is there a specific length ??

I'm looking to buy a full set but needs to be black and there are a few sets on fleabay at £50

Any thought anyone?