Cam timing wedge spec

[Chamberpains]

   
   

I picked these up off fleabay. I know, my stupid mistake for trying to be a bit cheaper on a simple tool. Quickserve says there should be a line on them that should line up with the top of the head.

Does anyone have a few measurements of an authentic Cummins wedge so I can place a mark on these?

I have a digital level so I can check if the angle is correct.