This is a Spektrum RC 1250Kv Firma Sensorless Brushless Motor, compatible with the Arrma Kraton 8S BLX kits.
Specifications:
Type: Sensorless Brushless
Length: 85mm (3.35″)
Width: 46mm (1.81″)
Diameter: 46mm (1.81″)
Weight: 732g
Shaft Length: 22mm(0.87″)
Shaft diameter: 5mm(0.20″)
Scale: 1/6
Kv: 1250
Voltage: 3S-8S
Rotation: CCW
ESC Connector: 6.5mm Bullet
Number of Poles: 4
Wire Length: 190mm (7.48″)