This tester use the principle of the increasing length when loosing twist to test the twist. Length 2.54cm. According to Standar CNS-1479
1. Testing Load: 0.5-30 g
2. Counter: LCD Display 1-20
3. Turning Speed: 50-70 rpm
4. Dimension: 83*18*33cm
5. Weight: 10kg

Please quoted a price, can send the price to my e-mail.