... ,capacities from50kgf(0.5KN) to 300000kgf(3000KN) TS-1013,CBR Loading Ring/CBR Proving Ring for material testingCharacteristics1, Proving Ring are used ... used in outfits of number of soil/cemnt/bitumen testing CBR testing ,unconfined compression test ,Marshall test.etc...2, High ... from50kgf(0.5KN) to 300000kgf(3000KN) are available. TS-1013,CBR Loading Ring/CBR Proving Ring for material testing