What sizes do they come in for a 1600 tp Im going to buy a vernier calliper but i want to make sure i get one thats accurate enough for measuring the thickness of the shims I was looking at his one it has an accuracy of 0.02mm http://www.ebay.co.uk/itm/Vernier-S...UK_Measuring_Tools_Levels&hash=item1c3043b73e