The 720 deceleration group is a 720 model motor with deceleration function, 

which can be installed in front of foam aircraft or paper airplane.
Blade length: 75mm
Motor size: diameter 7mm* length 26mm (axis diameter 1mm)
Rated voltage: 3.7V
Motor speed: 45000 revolutions per minute
The motor current is 3.7V, the time and space current is 130mA, and the blocking current is 1.2A.
Each set of weights: About 5g