Constant Pinions
T number parameters
16T 16T 3.175*9.54*9mm
17T 17T 3.175*10.07*9mm
18T 18T 3.175*10.6*9mm
19T 19T 3.175*11.13*9mm
20T 20T 3.175*11.66*9mm
21T 21T 3.175*12.19*9mm
22T 22T 3.175*12.72*9mm
23T 23T 3.175*13.25*9mm
24T 24T 3.175*13.78*9mm
25T 25T 3.175*14.31*9mm
Is it battery/power supply : N
Is it charger/adapter : N
Is Batteries Included : No
Model Number : QT201037