Type	Spur Gear	Pinion Gear	Gear Ratio
A :	M0.4x60T	M0.4*28T	60T/28T=2.14
B :	M0.4x62T	M0.4*26T	62T/26T=2.38
C :	M0.4x64T	M0.4*24T	64T/24T=2.67
D :	M0.4x66T	M0.4*22T	66T/22T=3.00
E :	M0.4x68T	M0.4*20T	68T/20T=3.40
F :	M0.4x70T	M0.4*18T	70T/18T=3.90
G :	M0.4x72T	M0.4*16T	72T/16T=4.50
H :	M0.4x74T	M0.4*14T	74T/14T=5.28
I :	M0.4x76T	M0.4*12T	76T/12T=6.30