XK2850-B-4400KV Brushless Inrunner

Specs.
# of poles: 4
Max Amps: 75A
Max Volt: 7.4V
Max Watts: 555W
Rpm/V: 4400kv
Resistance: 0.0089 ohms
No-load Current: 3.2A(7.4V)
Dimension: 28.0mm x 54.0mm
Mounting hole depth: 5mm
Length of extend Shaft: 12mm
Shaft diameter: 4mm
Weight: 141g