Concept 3640 9T  2250Kv  350W Inrunner Brushless Motor
  Power: 350W, Turns: 9, Resistance: 35, Idle Current: 2.3
  Esc: 45A, Battery Config: 3-4S,

Length: 42mm, Width: 36mm, Shaft: 5mm.  Weight: 170g

 Prop range 5x5-7x4.

Actual figures obtained by our test:-  7x5 APC 3s Li-Po 41A 14700RPM 375Watts "Motor was hot and operating beyond it's safe limit, we therefore recomend 7x4 max and good airflow " Please note this motor has a 5mm shaft and requires a prop  adaptor which will accept smaller props without reaming the prop beyond safe limits.