Below information taken from www.toymods.net
*note all measurements done with tape measure (need to buy verniers one day ) so give or take 1mm here or there. i have tried to make them as accurate as possible, but using a tape measure and having a cast on one hand makes it a lil more difficult
Celica ST205 caliper:
Weight: 5KG with two pads
Material: Alloy
Pistons: Four
Piston Diameter : 35mm each