... testing machineProduct detailsThe hardness tester is a semi-automatic hardness measuring instruments, which won the national quality silver medal in 1989. It ... ,HRF,HRG,HRH,HRK2. Initial Testing Force: 10Kg(98.07N)3.Testing Force: 60Kg(588N),100Kg(980N),150Kg(1471N)4. Exchange ...