... 1,made of special steel 2,capacities from50kgf(0.5KN) to 300000kgf(3000KN) TS-1013,CBR Loading Ring/CBR Proving Ring for ... are used for load measurements and are used in outfits of number of soil/cemnt/bitumen testing CBR testing ,unconfined compression ... test ,Marshall test.etc...2, High sensitivity proving rings,integral, made ...