...
-on the callipers:
-on the brake pads: 0.29mm (on Wilwoods website it says the pads are 7.6mm thick, after taking an average of a sample of pads 7.59mm was found. The lowest thickness was 7.48mm and the largest thickness was 7.77mm so the variance was taken.)
The brake disk/rotor can be between 0.15"-0.20" thick. Ours is currently a little but too thin.
http://www.wilwood.com/Calipers/CaliperList.aspx?subname=PS1