1. Penetrometer penetration force: 800 ± 8 N
2. Working stroke: 20 ± 0.1mm
3. Division of digital penetration depth meter: 0.01mm
4. Measure nail length: 400 ± 0.10mm
5. Measure nail diameter:3.5mm
6. Taper: 45 °
7.Slot length measuring gauge nails: 39.5 +0.1 0mm 8. Penetrometer ambient temperature: 4 ~ 40 ºC