[Collegeboy]

Hi Alan

If you look on one side of the roll bar, it will have a series of marks (square). Depending on how many there are, will depend on the thickness.

I.E. 3 marks denotes a thickness of 1.3mm
5 marks denotes a thickness of 1.5mm and so fourth.

Hope this helps and good luck for the weekend. Let us know how it went.

Paul