*Does not come with motor

*Only reduction unit

If you need this with motor,

please check this: OMR-4043-165

OMR-4043-165

This can rotate 22 inch sized propeller which you cannot use with the former model OMR-4043-172ll 
by changing gear ratio from 6.73 : 1 to 7.03 : 1. 
Also this has achived more stable and constant spped flight.
You can use 21 inch sized propeller as well.
Like the former model, the first belt is 9mm and the second belt is 11 mm. 
The structure for anti-vibration rubber remains the same and it makes the sound mild.

Specifications
Outer diameter: W60xH90mm
Length (Main body only): 137mm
Number of poles:4 poles
Shaft length:45mm
Weight: 632g
Applicable battery: 10 cell lipo battery
Applicable ESC :O.S. (OCA-1100HV)