I have 3 blades, 2 from Taiwan, 1 from Japan
Taiwan: 84.56g(1252hz, 250hz), 85.06g
Japan: 91.60g(1350hz, 300hz)
- Frequency are noted in (knocking on the surface, knocking on my head), all are measured 5 times and averaged out and rounded
The Japanese one sound a lot harder and the surface...