Specifications:  
No. Of cells:3-4 cells Li-Poly
RPM/V:919 RMP/V
Resistance: 0.038Ω
Dimensions:Φ38x35.9(L) mm
Shaft diameter:5 mm
Prop adapter output shaft: 8 mm
Weight:145.5 g / 5.13 oz
Recommended model weight: 600 - 1,600 g / 1.32-3.52 lb
Recommended prop without gearbox: 11 to 12 inch

Includes:
1 x brushless motor
1 x cross type motor mount
1 x aluminum prop adapter
4 x countersunk screws
4 x pan head screws
3 x M3.5 female spring connectors